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單項選擇題

Professor Smith promised to look（）my paper, that is, to read it carefully before the defence.

A.on
B.after
C.into
D.over

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It's our duty to preserve the planet for future（）

A.persons
B.generations
C.characters
D.nations

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I don't think I will ever feel（）spreading rumors.

A.consistent
B.common
C.comfortable
D.comparable

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