问题

What a pity! You ________ it down on your notebook.— Oh, my god! I forgot his mobile phone number.[ ]

A: could have written
B: should have written
C: must have written
D: would have written

正确答案是：

同类题型

There _____aknifeandforkonthetable.

eone spends his or her time, effort and money writing a book, for example, he or she deserves _______ for it.

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