单项选择题

-- Why does Sara know so much about Angkor Watt
-- She ______ have been there, or because of some other reasons.

A．must
B．oughtn't to
C．may
D．can't
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单项选择题
—Tom, you make bed before breakfast, ______—All right, mum.
A．don't you
B．doesn't he
C．will you
D．do you
单项选择题
—Susan, go and join your sister cleaning the yard.—Why it's ______ John sat there and did nothing.
A．him
B．he
C．I
D．me
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