问题描述:
A:she looks unhappy ( ).anything have happened to her?
B:I'm not sure,but I guess something () happened.
A May; must have
B Can; may have
C Must; may
D should; might have
请解释每一个选项.
B:I'm not sure,but I guess something () happened.
A May; must have
B Can; may have
C Must; may
D should; might have
请解释每一个选项.
问题解答:
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