【C18】
A.there is
B.no
C.there has
D.there have
A.there is
B.no
C.there has
D.there have
第1题
No matter how dry a desert may be, it is【C7】______to man. In some of the driest regions【C8】______has found valuable minerals. The discovery of petroleum, in particular,【C9】______great changes to the deserts. Oil is now the most important export of several desert countries in the Middle East, and it has been【C10】______in the Western Sahara. Saudi Arabia, Iraq and Kuwait are【C11】______called oil kingdoms.
Man has changed the desert in many ways to make it a【C12】______place to live in. But the greatest problem of the deserts【C13】______. That problem is【C14】______water over large areas. Man is turning to the sea【C15】______water.
Scientists are constantly【C16】______methods of【C17】______the salt from water so that it can be used in industry and agriculture. This is called desalinization. Perhaps the use of atomic power will make desalinization less expensive in the future. Some people believe that man will one day be able to【C18】______the climate and produce rainfall over the desert when it is wanted. This would be a simple【C19】______to the water problem, but we【C20】______much more about the atmosphere before that will be possible.
【C1】
A.there
B.where
C.which
D.that
第3题
【C9】
A.there is few
B.there is more
C.there are fewer
第5题
What will happen on June 27?
A.There will be a picnic.
B.There will be a speech.
C.There will be a contest.
D.There will be a festival.
第8题
【B9】
A.there is few
B.there is more
C.there are fewer
第9题
A.There is still honesty.
B.There is no honesty.
C.Honesty is not important.
D.None of the above.