问题
选择题
___________ whether he will come or not. [ ]
A. I'm sure
B. I'm sure that
C. I'm sure not that
D. I'm not sure
答案
答案：D
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___________ whether he will come or not. [ ]
A. I'm sure
B. I'm sure that
C. I'm sure not that
D. I'm not sure
答案：D