单选:I can't help but ( ) he was hiding something.A .to think B.think C.thinking D.thought

问题描述:

单选:I can't help but ( ) he was hiding something.A .to think B.think C.thinking D.thought
为什么选B而不是D

B.think
can't help but do sth
表示:情不自禁的做某事,是固定搭配,要用原型
祝好!