【題目】 How long do you suppose it is ______ he arrived here?

No more than half a week.

A. when B. before C. after D. since

【答案】D

【解析】考查連詞。把do you suppose看作插入語,去掉后觀察主句和從句的時態(tài)可以看出從句用的是一般過去時,而主語用的是一般現(xiàn)在時,所以只能用since引導時間狀語從句,It is+一段時間+since... 自從……到現(xiàn)在多久了。題干意思為“你認為他來到這里有多長時間了?”

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