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1 . The company operates out of modern offices and expensive hotel suites to create a(n) _________ of respectability.
A.cast | B.grade | C.air | D.beat |
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2 . The expert recommended us ________ the room every day.
A.airing | B.should air | C.having aired | D.to air |
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3 . Half of the population uses some kind of dietary supplement, and the number is on the ________ .
A.rise | B.way | C.line | D.air |
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4 . Open the windows and _____ the room. Let’s breath fresh air.
A.air | B.to clear |
C.to air | D.clearing |
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