1. In the experiment we kept a watchful eye _____ the developments and recorded every detail.

A) in B) at C) for D) on中华考试网(www．Examw。com)

2. There’s little chance that mankind would ________ a nuclear war.

A) retain B) endure C) maintain D) survive

3. Nuclear science be developed to benefit the people ________ harm them.

A) more than B) other than C) rather than D) better than

4. The French pianist who had been praised very highly ________ to be a great disappointment.

A) turned up B) turned in C) turned out D) turned down

5. Many difficulties have ________ as a result of the change over to a new type of fuel.

A) risen B) arisen C) raised D) arrived

答案：1-5 DDCCB