问题
选择题
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
答案：A
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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：A