问题补充：
I think he is to win, but Im not sure.
A. possible
B. likely
C. impossible
D. certain
答案：
A. possible
(答案→)B. likely
C. impossible
D. certain
解析：从语意上看，D肯定不能选；从英语习惯上看，A和C也不能选；此题最佳答案为B。请再看几例：
He is likely to arrive a bit late.他可能会晚到一会儿。
Its likely that he will go abroad.他可能会出国。
【标签】形容词辨析
