单项选择题

During the SARS period, it is especially important to ventilate the room.

A. dust
B. clean
C. remove
D. air
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单项选择题
The minister headed the committee.
A. was on the verge of
B. was on the basis of
C. was at the cost of
D. was in charge of
单项选择题
My uncle promised to furnish all I need.
A. offer
B. buy
C. lend
D. rent
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