【C16】A．build upB．bring upC．put upD．set up

sten --to understand spoken words.【C2】______speech recognition systems have been used by workers who need to enter data into a computer while their hands and eyes are otherwise【C3】______

The recognition of a limited vocabulary of single words from a single speaker is【C4】______much a solved problem. Some systems, however, have trouble【C5】______the noise of crumpling(弄皱,变皱)paper from the sound of a human【C6】______

Independent systems【C7】______recognize the same word【C8】______spoken by many different people can be built by sampling how several people say the same words【C9】______storing several patterns for each word. But the chances for error are greater and the vocabulary must usually be【C10】______. Even more difficult is continuous speech. People【C11】______running words together and even changing some sounds when they speak, m the computer【C12】______knows when one word ends and another starts,【C13】______the process much more difficult. It was reported that it【C14】______an hour on the largest computer in【C15】______use to recognize one second of continuous speech.

Some【C16】______have been made to improve continuous speech recognition【C17】______giving the. computer some rules of grammar to restrict which words can【C18】______which other words. A device has been developed that has a 5000-word vocabulary but requires the speaker to【C19】______between words.

These devices, however crude at the moment, will represent the【C20】______applications of what is considered a promising but extremely difficult technology.

【C1】

A．build

B．make

C．get

D．develop

【C8】

A．build

B．have built

C．building

D．built

A．build

B．use

C．become

D．do

It took us a long time to mend the house.

A．build

B．destroy

C．design

D．repair

The phrase "make room" in the last paragraph could be best replaced by ______.

A．build a booth

B．provide equipment

C．leave a certain amount of time

D．set aside enough space

Which of the followings is NOT mentioned as a way against traffic accidents？

A．Build more highways．

B．Stricter driving tests．

C．Test drivers every three years．

D．Raise age limit and lay down safety specifications．

A．build

B．demand

C．control

D．reflect

The phrase "make room" in the last paragraph can be best replaced by ______.

A．build a booth

B．provide equipment

C．leave a certain amount of time

D．set aside enough space

The author says that in some hot and dry areas it is advisable to ______.

A．build big lakes to store water

B．construct big pumping stations

C．channel water from nearby rivers to cropland

D．build small and cheap irrigation systems

【B19】

A．build

B．divided

C．painted

D．allowed