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题目:It is three months _____ Kitty moved here.

It is three months _____ Kitty moved here.

A. for B. since C. until D. when

【答案】

B

【解析】

句意:自从凯蒂搬到这儿,是3个月了。A. for 后接时间段,通常指做某事用了多长时间; B. since 自从,后可以接时间状语从句,动词通常是短暂性动词; C. until 直到; D. when当---时候;C/D项意思不通,故选B

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