单项选择题

Though they had cleaned the floor, there was still ______ rice on it.

A． a few
B． few
C． a little
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单项选择题
The classroom must ______.
A． be kept clean
B． keep cleaned
C． kept clean
单项选择题
--Where is Mary--She ______ to the cinema.
A． goes
B． will go
C． has gone
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