题目内容

In the dark street there wasn’t a single person _____ Mary could turn for help.
A.to whomB.to whichC.on whomD.on which
A
考察定语从句,该句为定语从句, 先行词是single person, 在从句中作turn to的宾语,turn to sb for help意为向某人求助,to 是介词,后面指人的时候只能选择whom,所以选择A
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