一道英语选择题(要说明理由)!When you called on me ,I was __ a visit to Mr.SmithA.on B.at C.in D.to
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![一道英语选择题(要说明理由)!When you called on me ,I was __ a visit to Mr.SmithA.on B.at C.in D.to](/uploads/image/z/14651779-67-9.jpg?t=%E4%B8%80%E9%81%93%E8%8B%B1%E8%AF%AD%E9%80%89%E6%8B%A9%E9%A2%98%28%E8%A6%81%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%29%21When+you+called+on+me+%2CI+was+__+a+visit+to+Mr.SmithA.on+B.at+C.in+D.to)
一道英语选择题(要说明理由)!When you called on me ,I was __ a visit to Mr.SmithA.on B.at C.in D.to
一道英语选择题(要说明理由)!
When you called on me ,I was __ a visit to Mr.Smith
A.on B.at C.in D.to
一道英语选择题(要说明理由)!When you called on me ,I was __ a visit to Mr.SmithA.on B.at C.in D.to
be on a visit to =visit
参观
A
固定搭配!on a visit~
恩我都是选A的
a 表示处于某种状态中,而且这是固定搭配on a visit.