单项选择题

They（）the dust by having double windows.

A. put down
B. shut out
C. cut short
D. taken off

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单项选择题
It is quite（）that he will change his mind.

A. sure
B. right
C. exact
D. certain
单项选择题
Where did the man go with the children last month（）

A. The zoo.
B. The beach.
C. The park.
D. The street.
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