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【单选题】

--Dad, can I go to the movies tonight?
--Sure, but you ____ come back home before 9 o’clock.

A.
can
B.
must
C.
may
D.
might
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参考答案:
参考解析:
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举一反三

【单选题】It's cold outside. Please tell him ______ her coat. [ ]

A.
don't take off
B.
not to take off
C.
don't put on
D.
not to put on