单项选择题

The library needs ______, but it'll have to wait until Sunday.

A．cleaning
B．be cleaned
C．clean
D．being cleaned
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单项选择题
Will you ______ me a favor, please
A．do
B．make
C．give
D．bring
单项选择题
She's upstairs ______ letters.
A．writes
B．is writing
C．write
D．writing
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