问题
选择题
Please drop ＿＿＿＿＿＿＿ my home when you are free.
A．in
B．on
C．in on
D．in at
答案
答案：D
drop in at sp.顺便拜访某地
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Please drop ＿＿＿＿＿＿＿ my home when you are free.
A．in
B．on
C．in on
D．in at
答案：D
drop in at sp.顺便拜访某地