Why did you just sit and watch?You _______ me.A.could help B.should help C.could have helped D.must have helped

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Why did you just sit and watch?You _______ me.A.could help B.should help C.could have helped D.must have helped
Why did you just sit and watch?You _______ me.
A.could help B.should help C.could have helped D.must have helped

Why did you just sit and watch?You _______ me.A.could help B.should help C.could have helped D.must have helped
答案C 根据上文的过去时态可知,此句谈的是过去的事,故排除A和C.根据语境排除D. 查看原帖>>