问题
选择题
If you really have to leave during the meeting, you'd better leave _____ the back door. [ ]
A. for
B. by
C. across
D. out
答案
答案：B
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If you really have to leave during the meeting, you'd better leave _____ the back door. [ ]
A. for
B. by
C. across
D. out
答案：B