问题
选择题
— I haven't seen your uncle for quite a long time.
— He is busy ______ a novel. [ ]
A. write
B. writing
C. written
D. to write
答案
答案：B
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— I haven't seen your uncle for quite a long time.
— He is busy ______ a novel. [ ]
A. write
B. writing
C. written
D. to write
答案：B