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
--Why did you buy the car earlier --I ______ Tom in Boston by car next month, but I've changed my mind.
A．visit
B．will visit
C．am going to visit
D．was going to visit
单项选择题
She admitted ______ a story to explain her absence.
A．to have made up
B．having told
C．to have told
D．having made up
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