Aren't you tired? I______you had done enough for today. （2009年考试真题）
A、
should have thought
B、
must have thought
C、
might have thought
D、
could have thought
【正确答案】
A
【答案解析】
解析：本题考点为情态动词should+have done，表示“过去本该做但实际没做”。
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