单项选择题

Mike looks so sleepy in the class; he ______ up last night.

[A] must stay
[B] should have stayed
[C] must have stayed
[D] is sure to stay

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单项选择题

______ in a famed university abroad was what his parents wished for.

[A] The boy to be cultivated
[B] The boy cultivated
[C] The boy's being cultivated
[D] The boy was cultivated

单项选择题

She ought to make a shift now; she is in a bad mood because she ______ in the dull work too long.

[A] had engaged
[B] is engaging
[C] has been engaged
[D] engaged

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