单项选择题

We______her letter last week. We don't know what has happened to her.

A．must receive
B．must have received
C．ought to receive
D．ought to have received
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单项选择题
You are quite wrong, she ______ like you.
A．can
B．has
C．should
D．does
单项选择题
What matters______ not winning but participating.
A．are
B．to be
C．was
D．is
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