单项选择题

______ it rains, we will have a picnic this Saturday.

A．If
B．As long as
C．Although
D．Unless
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I apologized______Lily for interrupting her.
A．at
B．to
C．for
D．with
单项选择题
Be sure to write to us,______
A．will you
B．aren't you
C．can you
D．can't you
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