单项选择题

The classroom needs ______.

A．clean
B．to clean
C．cleaning
D．being cleaned
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单项选择题
This invention is so great. ______.

A．So is it
B．So it is
C．Nor is mine
D．Nor is it
单项选择题
He admires Mrs. Brown, ______ I find strange.
A．which
B．who
C．that
D．in which
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