Scientists a lot of experiments on animals hoping to find and effective way to cure the

问题补充：

Scientists a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.

A. carried on

B. carried out

C. carried away

D. carried off

答案：

A. carried on

(答案→)B. carried out

C. carried away

D. carried off

解析：本题考查动词短语辨析。carry on表示“进行、继续”；carry out表示“执行、贯彻”； carry off表示“夺得”某种奖赏。