The crime rate has continued to rise in American cities despite efforts on the part of both government and private citizens to c

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问题 The crime rate has continued to rise in American cities despite efforts on the part of both government and private citizens to curb ______.

选项 A、them
B、its
C、him
D、it

答案D

解析 通读全句,很明显在这里要控制的是用it代指的“犯罪率”,因此其他三个选项都不适合。
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