问题

She may not be free today.—___, we’ll have to put the meeting off.
A:If may
B:If not
C:If she may not
D:If she may not be free today
B:If not
C:If she may not
D:If she may not be free today
正确答案是:
同类题型
Where is your dictionary, John —Oh, I _______ it to David yesterday. He’ll return it tomorrow.
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