问题
选择题
I don't know ______________ next.[ ]
A. what to do it
B. how to do it
C. what I would do it
D. how I would do it
答案
答案：B
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I don't know ______________ next.[ ]
A. what to do it
B. how to do it
C. what I would do it
D. how I would do it
答案：B
