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