Beijing has cut its birth-rate ______ almost 60 percent in the past 20 years.A、t

游客2023-07-21 11

问题 Beijing has cut its birth-rate ______ almost 60 percent in the past 20 years.

选项 A、to
B、by
C、for
D、with

答案 B

解析 “…+by+数字或倍数+…”当本句型中有比较级出现或有表示增减意义的动词或分词出现时，by后表示的是净增减的数或净增加的倍数。

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