单项选择题

We all think that the new device he has proposed is ingenious.

A. effective
B. clever
C. implausible
D. original
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Everybody was glad ad to see Mary back.
A. sorry
B. sad
C. angry
D. happy
单项选择题
They converted the spare bedroom into an office.
A. reduced
B. moved
C. reformed
D. turned
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