题目内容
—Could you please come to the museum with me this afternoon?
—Sorry, I ______. I have to take a piano lesson at 2 pm.
—Sorry, I ______. I have to take a piano lesson at 2 pm.
[ ]
A. couldn't
B. mustn't
C. can't
D. needn't
B. mustn't
C. can't
D. needn't
C
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