单项选择题

It was very kind of you to do the washing-up, but you really ______ it.

A. needn’t do
B. shouldn’t have one
C. didn’t have to do
D. mustn’t have done
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Mary has been invited to the party, but she wasn’t ______.
A. must
B. should
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He became a successful actor ______ his father never was.
A. who
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