题目内容

That was a(n)remark for him to make, and all of us who knew him well didn't know why.

A. easy
B. peculiar
C. timid
D. obscure

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Our knowledge of dinosaurs is whollyfrom the bones that have been found here and there buried in the ground.

A. acquired
B. retained
C. absorbed
D. sought

She wandered whether triangles, which had only three sides, wereas polygons, which she thought of as many-sided.

A. qualified
B. theorized
C. estimated
D. multiplied

There is no perfect trading system, and each of the proposed ones has its.

A. limits
B. borders
C. frontiers
D. limitations

Henry will not be able to attend the meeting tonight becausea class then.

A. he must be teaching
B. he will be teaching
C. he will have taught
D. of him has to teach

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