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

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单选:Ican''thelpbut()hewashidingsomething.A.tothinkB.thinkC.thinkingD.thought为什么选B而不是D单选:Ican''thelpbut(

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
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

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!

B
这里think和help并列,所以用动词原型