问题
选择题
We __________ so tired. We've only been to a party.
A．mustn't have felt
B．wouldn't have felt
C．shouldn't have felt
D．couldn't have felt
答案
答案：C
本题是情态动词的考查。should（not）后接动词的完成式表示“本来（不）应该做但实际上做了”的含义。
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