摘要： 答案:can’t/ couldn’t have done it 考点:情态动词 解析:当要对过去进行肯定的推测时.要用 “can’t/couldn’t+have+done 的结构
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—I can't find my pen．
—You ______ it in the classroom．
[
]A．must leave B．must forget
C．must have forgot D．must have left
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We can't live _____ water _____ air．
[ ]
A．with, and B．with, or C．without, or D．no, or
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I can't _______ him doing a thing like that.
[
]A
．believe B．see C．think D．imagine 查看习题详情和答案>>