The unemployment rate has become much lower ______ the government took these mea

游客2024-07-14  10

问题 The unemployment rate has become much lower ______ the government took these measures.

选项 A、but
B、since
C、if
D、while

答案 B

解析 本题考查连词since的用法。since在句中意为“自从”,常用于引导一般过去时的从句,而主句部分则通常为完成时态。分析句子的时态可知,主句的时态为现在完成时,从句的时态为一般过去时,符合since的用法,而且符合句意,所以确定B)为本题的答案。
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