单项选择题

I ______ have written to him because he phoned me shortly afterwards.

A．ought to
B．must
C．couldn't
D．needn't
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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
单项选择题
--Would you like to go picnicking with us today-- ______,but it looks like rain.
A．Yes, I would like
B．I'm going to
C．Sorry, I don't want to
D．Well, I'd like to
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