He will tell us why he feels so strong that each of us has a role______in malting the earth a better place to live on.

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问题 He will tell us why he feels so strong that each of us has a role______in malting the earth a better place to live on.

选项 A、to have played
B、to play
C、to be played
D、to be playing

答案B

解析 虽然role和Play为被动关系,但是因为从句中的主语each of us是play的逻辑主语,因此不用被动语态,排除[C]。而[A]和[D]所表达的时态不对。
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