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the 1990s, the number of antelopes had fallen to about 50,000.A.DuringB.SinceC.B

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the 1990s, the number of antelopes had fallen to about 50,000.A.DuringB.SinceC.B

____ the 1990s, the number of antelopes had fallen to about 50,000.

A.During

B.Since

C.By

D.Over

试题答案

C

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