He was so busy that he couldn’t help ____________ the experiment.A．doingB．doC．di
题型：不详难度：来源：
| He was so busy that he couldn’t help ____________ the experiment. |
答案
| B |
解析
试题分析：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。
点评：Can’t help doing sth情不自禁做某事；can’t help do sth不能帮忙做某事； |
举一反三
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