16.John was late for the business meeting because his flight had been _____ by a heavy storm.
A.kept
B.stopped
C.slowed
D.delayed
答案：D.考查动词delay的用法。be late for意为“迟到”，因此根据句意，航班应该是受到“耽搁，延误”，故选D项。
17.It's ten years since the scientist _____ on his life's work of discovering the valuable chemical.
A.made for
B.set out
C.took off
D.turned up
答案：B.
解析：自从这位科学家开始从事发现有价值的化学品的工作以来，已经十年了。make for前往;take off起飞;脱下;匆匆离开;turn up出现;查(字典);开大(声音)。
18.Hospital staff burst into cheers after doctors completed a 20-hour operation to have _____.
A.isolated
B.separated
C.divided
D.removed
答案：B.isolate使……孤立;separate把……分开(原来不是整体);divide把整体分成部分;remove把……移开。
19.I don't _____ rock 'n' roll.It's much too noisy for my taste.?
A.go after
B.go away with
C.go into
D.go in for
答案：D.go in for喜欢;go after追求;go away with随身带走;go into从事，参加。
20.He accidentally _____ he had quarreled with his wife and that he hadn't been home for a couple of weeks.?
A.let out
B.took care
C.made sure
D.made out
答案：A.let out意为“泄漏，说出”;take care意为“当心”;make sure意为“确保”;make out意为“识别，辨别”。
