21.This doctor has spent more than a quarter century， bringing this new technology to _______________.

　　A.acceptance

　　B.finish

　　C.achievement

　　D.reality

　　22.He lost his left leg _______________ a car accident.

　　A.in relation to

　　B.in connection with

　　C.as a result of

　　D.in case of

　　23.The arrival of the police brought an end _______________ the fight in the street.

　　A.with

　　B.into

　　C.over

　　D.to

　　24.I found my hometown had changed _______________ recognition when I visited it last year.

　　A.out of

　　B.beyond

　　C.without

　　D.above

　　25.When we watched the clown performing， we could not _______________ laughing.

　　A.break out

　　B.repress

　　C.help

　　D.burst into

　　26.In the schools of ancient Greece and Rome， testing usually _______________ saying poetry aloud and giving speeches.

　　A.consisted of

　　B.composed of

　　C.made up of

　　D.built up of

　　27.If you continue to put on weight， you will have to _______________ a diet before long.

　　A.begin with

　　B.take

　　C.go on

　　D.start out

　　28.They said the operation had been successful and they expected his father to _______________.

　　A.pull off

　　B.pull in

　　C.pull out

　　D.pull through

　　29.They will hold a concert next month in order to _______________ money for the disabled.

　　A.raise

　　B.receive

　　C.rise

　　D.accumulate

　　30.The control of the sand storms will ________________ a tremendous amount of work and money.

　　A.ask for

　　B.depend on

　　C.involve

　　D.include