He was so busy that he couldn’t help the experiment.A. doingB. doC. didD. done

发布时间：2020-08-16 23:54:27

He was so busy that he couldn’t help      the experiment.
A. doing
B. do
C. did
D. done

网友回答

A. doing
(答案→)B. do
C. did
D. done
解析：考查固定词组。Can’t help doing sth情不自禁做某事；can’t help do sth不能帮忙做某事；句意：他如此的忙以至于不能帮助做实验。故B正确。
以上问题属网友观点，不代表本站立场，仅供参考！