单项选择题

There is nobody in the office ______ there

A． isn't
B． aren't
C． is
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单项选择题
She forgot to tell me which bus to ______.
A． travel
B． take
C． go
单项选择题
The students ______ the History Museum if it ______ fine tomorrow.
A． will visit, is
B． will visit, will be
C． would visit, was
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