题目内容
He __________ his aunt’s when he went to Wuhan on business.
| A.called on | B.called at | C.dropped in on | D.dropped in |
B
解析
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题目内容
He __________ his aunt’s when he went to Wuhan on business.
| A.called on | B.called at | C.dropped in on | D.dropped in |
B
解析