问题
选择题
I'm not sure________ next week. [ ]
A. how he comes back
B. whether he will come back
C. when will he come back
D. where will he come back
答案
答案：B
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I'm not sure________ next week. [ ]
A. how he comes back
B. whether he will come back
C. when will he come back
D. where will he come back
答案：B
