◎ 题干
The teacher _____ some old friends on his vacation trip to Paris.
[     ]
A. dropped by
B. dropped in
C. droped by
D. droped in
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The teacher _____ some old friends on his vacation trip to Paris.[ ]A. dropped by B. dropped in C. droped by D. droped in…”主要考查了你对  【动词短语】【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。