题目内容

Since his wife died, he has______ himself into the research work.

A. devoted
B. dedicated
C. thrown
D. contributed

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Environmentalists are doing everything within their power to______the impact of the oil spill.

A. reject
B. belittle
C. minimize
D. reclaim

The improvements in technology have ______the prices of computer considerably in recent months.

A. brought back
B. brought down
C. brought on
D. brought up

据报导明年那里要修建一条新铁路。

他们告诉我，到年底他们在一起工作就要满三十年了。