May I have a balloon（）

If someone asked you, “What color is the sky？” I expect that you would answer, “blue.” I am afraid that you would be wrong. The sky has no color. When we see blue, we are looking at blue sunlight. The sunlight is shining on little bits of dust in the air.

We know that there is air all around the world. We could not breathe without air. Airplanes could not fly without air. Thy need air to lift their wings. Airplanes cannot fly very high because as they go higher the air gets thinner. If we go far enough away from the earth, we find there is no air. What is the sky？ The sky is space. In this space there is nothing except the sun, the moon and all the stars. Scientists have always wanted to know more about the other worlds in the space. They have looked at them through telescopes and in this way they have found out a great deal. The moon is about 384,000 kilometers away from the earth. An airplane cannot fly to the moon but there is a thing that can fly even when there is no air. This is rocket.

I am sure that you are asking, “How does a rocket fly？” if you want to know, get a balloon and then blow it up until it is quite big. Do not tie up the neck of the balloon. Let go! The balloon will fly off through the air very quickly. The air inside the balloon tries to get out. It rushes out through the neck of the balloon and this pushes the balloon through the air. It does not need wings like an airplane. This is how a rocket works. It is not made of rubber like a balloon, of course. It is made of metal. The metal must not be heavy but it must be very strong. There is gas inside the rocket which is made very hot. When it rushes out of the end of the rocket, the rocket is pushed up into the air.

Rockets can fly fat out into space. Rockets with men inside them have already reached the moon. Several rockets, without men inside them, have been sent to other worlds much father away. One day rockets may be able to go anywhere in the space.

36. What color is the sky()？

A. It is blue .

B. It is white.

C. It is grey.

D. It has no color.

37. When an airplane flies too high()？

A. the air will be too thin to support its wings

B. the air will become thicker

C. the air will exert pressure on it

D. the air will disappear in no time

38. A rocket can fly to the moon because ().

A. it looks like a balloon

B. it is much lighter than an airplane

C. it doesn’t have wings

D. it works like an untied balloon

39. Which of the following statements about a rocket is NOT true()？

A. It can fly when there is no air.

B. It can fly without wings

C. It is made of strong metal

D. it is propelled by burning gas inside it.

40. A rocket is pushed up into the air when ().

A. hot gas rushes out of its head

B. it is powered by gas

C. hot gas rushes out of its bottom

D. hot gas rushes out of its neck.

听力原文： Balloons have been used for sport for about 100 years. There are two kinds of sport balloons: gas and hot air. Hot air balloons are safer than gas balloons, which may catch fire. Hot air balloons are preferred by most balloonists in the United States because of their safety. They are also cheaper and easier to man age than gas balloons. Despite the ease of operating a balloon, pilots must watch the weather carefully. Sport, balloon flights are best early in the morning or late in the afternoon, when the wind is light. Over the years, balloonists have tried unsuccessfully to cross the Atlantic Ocean. It wasn't until 1978 that three American balloonists succeeded. It took them just six days to make their trip from their homes in the United States to Paris, France. Their voyage captured the imagination of the whole world.

(31)

A．Kid's play balloons.

B．Weather balloons.

C．Balloons for safety patrols.

D．Balloons for recreation.

【T16】

A.THE HIGHEST MOUNTAINS

B.AS BUNGEE JUMPING

C.BE CURED

D.TO SEEK DANGER A.DISEASES COULD NOT EASILY【T13】______, AND LIFE WAS A CONTINUOUS BATTLE FOR SURVIVAL

B.MOST PEOPLE WOULD SAY ARE AS RISKY【T14】______INVOLVE JUMPING

C.THE ANSWER FOR SOME OF THESE PEOPLE IS【T15】______IN ACTIVITIES

D.THOSE WHO HAVE CLIMBED【T16】______, EXPLORED UNKNOWN PARTS OF THE WORLD OR SAILED IN SMALL BOATS AROUND THE WORLD MORE AND MORE PEOPLE ARE TAKING PART IN DANGEROUS SPORTS AND ACTIVITIES.OF COURSE, THERE HAVE ALWAYS BEEN PEOPLE WHO HAVE LOOKED FOR ADVENTURE—【T17】______ACROSS THE GREATEST OCEANS.NOW, HOWEVER, THERE ARE PEOPLE WHO SEEK ANIMMEDIATE EXCITEMENT FROM A RISKY ACTIVITY WHICH MAY ONLY LAST A FEW MINUTES OR EVEN SECONDS. I WOULD CONSIDER BUNGEE JUMPING TO BE A GOOD EXAMPLE OF SUCH AN ACTIVITY.YOU JUMP FROM A HIGH PLACE (PERHAPS A BRIDGE OR A HOT-AIR BALLOON) 200 METERS ABOVE THE GROUND WITH AN ELASTIC ROPE TIED TO YOUR ANKLES.YOU FALL AT UP TO 150 KILOMETERS AN HOUR UNTIL THE ROPE STOPS YOU FROM HITTING THE GROUN

D.IT IS ESTIMATED THAT TWO MILLION PEOPLE AROUND THE WORLDHAVE NOW TRIED BUNGEE JUMPIN

G.OTHER ACTIVITIES WHICH【T18】______FROM TALL BUILDINGSAND DIVING INTO THE SEA FROM THE TOP OF HIGH CLIFFS. WHY DO PEOPLE TAKE PART IN SUCH ACTIVITIES AS THESE？ SOME PSYCHOLOGISTS SUGGEST THAT IT IS BECAUSE LIFE IN MODERN SOCIETIES HAS BECOME SAFE AND BORIN

G.NOT VERY LONG AGO, PEOPLE"S LIVES WERE CONSTANTLY UNDER THREAT.THEY HAD TO GO OUT AND HUNT FOR FOOD,【T19】______. NOWADAYS, ACCORDING TO MANY PEOPLE, LIFE OFFERS LITTLE EXCITEMENT.THEY LIVE AND WORK IN COMPARATIVELY SAFE ENVIRONMENT; THEY BUY FOOD IN SHOPS; AND THERE ARE DOCTORS AND HOSPITALS TO LOOK AFTER THEM IF THEY BECOME ILL.【T20】______SUCH AS BUNGEE JUMPIN

G.

【T13】

A.THE HIGHEST MOUNTAINS

B.AS BUNGEE JUMPING

C.BE CURED

D.TO SEEK DANGER A.DISEASES COULD NOT EASILY【T13】______, AND LIFE WAS A CONTINUOUS BATTLE FOR SURVIVAL

B.MOST PEOPLE WOULD SAY ARE AS RISKY【T14】______INVOLVE JUMPING

C.THE ANSWER FOR SOME OF THESE PEOPLE IS【T15】______IN ACTIVITIES

D.THOSE WHO HAVE CLIMBED【T16】______, EXPLORED UNKNOWN PARTS OF THE WORLD OR SAILED IN SMALL BOATS AROUND THE WORLD MORE AND MORE PEOPLE ARE TAKING PART IN DANGEROUS SPORTS AND ACTIVITIES.OF COURSE, THERE HAVE ALWAYS BEEN PEOPLE WHO HAVE LOOKED FOR ADVENTURE—【T17】______ACROSS THE GREATEST OCEANS.NOW, HOWEVER, THERE ARE PEOPLE WHO SEEK ANIMMEDIATE EXCITEMENT FROM A RISKY ACTIVITY WHICH MAY ONLY LAST A FEW MINUTES OR EVEN SECONDS. I WOULD CONSIDER BUNGEE JUMPING TO BE A GOOD EXAMPLE OF SUCH AN ACTIVITY.YOU JUMP FROM A HIGH PLACE (PERHAPS A BRIDGE OR A HOT-AIR BALLOON) 200 METERS ABOVE THE GROUND WITH AN ELASTIC ROPE TIED TO YOUR ANKLES.YOU FALL AT UP TO 150 KILOMETERS AN HOUR UNTIL THE ROPE STOPS YOU FROM HITTING THE GROUN

D.IT IS ESTIMATED THAT TWO MILLION PEOPLE AROUND THE WORLDHAVE NOW TRIED BUNGEE JUMPIN

G.OTHER ACTIVITIES WHICH【T18】______FROM TALL BUILDINGSAND DIVING INTO THE SEA FROM THE TOP OF HIGH CLIFFS. WHY DO PEOPLE TAKE PART IN SUCH ACTIVITIES AS THESE？ SOME PSYCHOLOGISTS SUGGEST THAT IT IS BECAUSE LIFE IN MODERN SOCIETIES HAS BECOME SAFE AND BORIN

G.NOT VERY LONG AGO, PEOPLE"S LIVES WERE CONSTANTLY UNDER THREAT.THEY HAD TO GO OUT AND HUNT FOR FOOD,【T19】______. NOWADAYS, ACCORDING TO MANY PEOPLE, LIFE OFFERS LITTLE EXCITEMENT.THEY LIVE AND WORK IN COMPARATIVELY SAFE ENVIRONMENT; THEY BUY FOOD IN SHOPS; AND THERE ARE DOCTORS AND HOSPITALS TO LOOK AFTER THEM IF THEY BECOME ILL.【T20】______SUCH AS BUNGEE JUMPIN

G.

【T18】

A.THE HIGHEST MOUNTAINS

B.AS BUNGEE JUMPING

C.BE CURED

D.TO SEEK DANGER A.DISEASES COULD NOT EASILY【T13】______, AND LIFE WAS A CONTINUOUS BATTLE FOR SURVIVAL

B.MOST PEOPLE WOULD SAY ARE AS RISKY【T14】______INVOLVE JUMPING

C.THE ANSWER FOR SOME OF THESE PEOPLE IS【T15】______IN ACTIVITIES

D.THOSE WHO HAVE CLIMBED【T16】______, EXPLORED UNKNOWN PARTS OF THE WORLD OR SAILED IN SMALL BOATS AROUND THE WORLD MORE AND MORE PEOPLE ARE TAKING PART IN DANGEROUS SPORTS AND ACTIVITIES.OF COURSE, THERE HAVE ALWAYS BEEN PEOPLE WHO HAVE LOOKED FOR ADVENTURE—【T17】______ACROSS THE GREATEST OCEANS.NOW, HOWEVER, THERE ARE PEOPLE WHO SEEK ANIMMEDIATE EXCITEMENT FROM A RISKY ACTIVITY WHICH MAY ONLY LAST A FEW MINUTES OR EVEN SECONDS. I WOULD CONSIDER BUNGEE JUMPING TO BE A GOOD EXAMPLE OF SUCH AN ACTIVITY.YOU JUMP FROM A HIGH PLACE (PERHAPS A BRIDGE OR A HOT-AIR BALLOON) 200 METERS ABOVE THE GROUND WITH AN ELASTIC ROPE TIED TO YOUR ANKLES.YOU FALL AT UP TO 150 KILOMETERS AN HOUR UNTIL THE ROPE STOPS YOU FROM HITTING THE GROUN

D.IT IS ESTIMATED THAT TWO MILLION PEOPLE AROUND THE WORLDHAVE NOW TRIED BUNGEE JUMPIN

G.OTHER ACTIVITIES WHICH【T18】______FROM TALL BUILDINGSAND DIVING INTO THE SEA FROM THE TOP OF HIGH CLIFFS. WHY DO PEOPLE TAKE PART IN SUCH ACTIVITIES AS THESE？ SOME PSYCHOLOGISTS SUGGEST THAT IT IS BECAUSE LIFE IN MODERN SOCIETIES HAS BECOME SAFE AND BORIN

G.NOT VERY LONG AGO, PEOPLE"S LIVES WERE CONSTANTLY UNDER THREAT.THEY HAD TO GO OUT AND HUNT FOR FOOD,【T19】______. NOWADAYS, ACCORDING TO MANY PEOPLE, LIFE OFFERS LITTLE EXCITEMENT.THEY LIVE AND WORK IN COMPARATIVELY SAFE ENVIRONMENT; THEY BUY FOOD IN SHOPS; AND THERE ARE DOCTORS AND HOSPITALS TO LOOK AFTER THEM IF THEY BECOME ILL.【T20】______SUCH AS BUNGEE JUMPIN

G.

【T17】

A.THE HIGHEST MOUNTAINS

B.AS BUNGEE JUMPING

C.BE CURED

D.TO SEEK DANGER A.DISEASES COULD NOT EASILY【T13】______, AND LIFE WAS A CONTINUOUS BATTLE FOR SURVIVAL

B.MOST PEOPLE WOULD SAY ARE AS RISKY【T14】______INVOLVE JUMPING

C.THE ANSWER FOR SOME OF THESE PEOPLE IS【T15】______IN ACTIVITIES

D.THOSE WHO HAVE CLIMBED【T16】______, EXPLORED UNKNOWN PARTS OF THE WORLD OR SAILED IN SMALL BOATS AROUND THE WORLD MORE AND MORE PEOPLE ARE TAKING PART IN DANGEROUS SPORTS AND ACTIVITIES.OF COURSE, THERE HAVE ALWAYS BEEN PEOPLE WHO HAVE LOOKED FOR ADVENTURE—【T17】______ACROSS THE GREATEST OCEANS.NOW, HOWEVER, THERE ARE PEOPLE WHO SEEK ANIMMEDIATE EXCITEMENT FROM A RISKY ACTIVITY WHICH MAY ONLY LAST A FEW MINUTES OR EVEN SECONDS. I WOULD CONSIDER BUNGEE JUMPING TO BE A GOOD EXAMPLE OF SUCH AN ACTIVITY.YOU JUMP FROM A HIGH PLACE (PERHAPS A BRIDGE OR A HOT-AIR BALLOON) 200 METERS ABOVE THE GROUND WITH AN ELASTIC ROPE TIED TO YOUR ANKLES.YOU FALL AT UP TO 150 KILOMETERS AN HOUR UNTIL THE ROPE STOPS YOU FROM HITTING THE GROUN

D.IT IS ESTIMATED THAT TWO MILLION PEOPLE AROUND THE WORLDHAVE NOW TRIED BUNGEE JUMPIN

G.OTHER ACTIVITIES WHICH【T18】______FROM TALL BUILDINGSAND DIVING INTO THE SEA FROM THE TOP OF HIGH CLIFFS. WHY DO PEOPLE TAKE PART IN SUCH ACTIVITIES AS THESE？ SOME PSYCHOLOGISTS SUGGEST THAT IT IS BECAUSE LIFE IN MODERN SOCIETIES HAS BECOME SAFE AND BORIN

G.NOT VERY LONG AGO, PEOPLE"S LIVES WERE CONSTANTLY UNDER THREAT.THEY HAD TO GO OUT AND HUNT FOR FOOD,【T19】______. NOWADAYS, ACCORDING TO MANY PEOPLE, LIFE OFFERS LITTLE EXCITEMENT.THEY LIVE AND WORK IN COMPARATIVELY SAFE ENVIRONMENT; THEY BUY FOOD IN SHOPS; AND THERE ARE DOCTORS AND HOSPITALS TO LOOK AFTER THEM IF THEY BECOME ILL.【T20】______SUCH AS BUNGEE JUMPIN

G.

【T14】

A.THE HIGHEST MOUNTAINS

B.AS BUNGEE JUMPING

C.BE CURED

D.TO SEEK DANGER A.DISEASES COULD NOT EASILY【T13】______, AND LIFE WAS A CONTINUOUS BATTLE FOR SURVIVAL

B.MOST PEOPLE WOULD SAY ARE AS RISKY【T14】______INVOLVE JUMPING

C.THE ANSWER FOR SOME OF THESE PEOPLE IS【T15】______IN ACTIVITIES

D.THOSE WHO HAVE CLIMBED【T16】______, EXPLORED UNKNOWN PARTS OF THE WORLD OR SAILED IN SMALL BOATS AROUND THE WORLD MORE AND MORE PEOPLE ARE TAKING PART IN DANGEROUS SPORTS AND ACTIVITIES.OF COURSE, THERE HAVE ALWAYS BEEN PEOPLE WHO HAVE LOOKED FOR ADVENTURE—【T17】______ACROSS THE GREATEST OCEANS.NOW, HOWEVER, THERE ARE PEOPLE WHO SEEK ANIMMEDIATE EXCITEMENT FROM A RISKY ACTIVITY WHICH MAY ONLY LAST A FEW MINUTES OR EVEN SECONDS. I WOULD CONSIDER BUNGEE JUMPING TO BE A GOOD EXAMPLE OF SUCH AN ACTIVITY.YOU JUMP FROM A HIGH PLACE (PERHAPS A BRIDGE OR A HOT-AIR BALLOON) 200 METERS ABOVE THE GROUND WITH AN ELASTIC ROPE TIED TO YOUR ANKLES.YOU FALL AT UP TO 150 KILOMETERS AN HOUR UNTIL THE ROPE STOPS YOU FROM HITTING THE GROUN

D.IT IS ESTIMATED THAT TWO MILLION PEOPLE AROUND THE WORLDHAVE NOW TRIED BUNGEE JUMPIN

G.OTHER ACTIVITIES WHICH【T18】______FROM TALL BUILDINGSAND DIVING INTO THE SEA FROM THE TOP OF HIGH CLIFFS. WHY DO PEOPLE TAKE PART IN SUCH ACTIVITIES AS THESE？ SOME PSYCHOLOGISTS SUGGEST THAT IT IS BECAUSE LIFE IN MODERN SOCIETIES HAS BECOME SAFE AND BORIN

G.NOT VERY LONG AGO, PEOPLE"S LIVES WERE CONSTANTLY UNDER THREAT.THEY HAD TO GO OUT AND HUNT FOR FOOD,【T19】______. NOWADAYS, ACCORDING TO MANY PEOPLE, LIFE OFFERS LITTLE EXCITEMENT.THEY LIVE AND WORK IN COMPARATIVELY SAFE ENVIRONMENT; THEY BUY FOOD IN SHOPS; AND THERE ARE DOCTORS AND HOSPITALS TO LOOK AFTER THEM IF THEY BECOME ILL.【T20】______SUCH AS BUNGEE JUMPIN

G.

A) should have B) may have C) must have D) shall have