题目内容
--I'm sure Andrew will win the first prize in the final.
--I think so. He ____ for it for months.
A.is preparing B. was preparing C. had been preparing D. has been preparing
D
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题目内容
--I'm sure Andrew will win the first prize in the final.
--I think so. He ____ for it for months.
A.is preparing B. was preparing C. had been preparing D. has been preparing
D