问题
选择题
As far as I know, they haven't decided when _____ for Shanghai.[ ]
A. be leaving
B. to leave
C. leav
ing
D. leave
答案
答案：B
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As far as I know, they haven't decided when _____ for Shanghai.[ ]
A. be leaving
B. to leave
C. leaving
D. leave
答案：B
