题目

My English teacher ________ my home the day before yesterday.     A.called on         B.called at       C.dropped in       D.called for 答案: B call on, call at, drop in 都有“拜访,走访”之意。call on的宾语是人,call at 的宾语是某个地方,drop in 是不及物动词短语,后跟宾语时必须加上on (后跟人)或at (跟地点)。
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