She will tell us why she feels so strong that each of us has a role________in making the earth a better place to live in.

A．to have played 　B．to play

C．to be played 　D．to be playing

 

B

【解析】主要考查動詞不定式的時(shí)態(tài)與語態(tài)。從句意看，整個(gè)動作發(fā)生在將來，to play作a role的定語，其間存在著邏輯上的動賓關(guān)系，又與句中的each of us存在著邏輯上的主謂關(guān)系，故動詞不定式用主動形式表示被動意義。動詞不定式to play意指將來的動作；to have played意指已經(jīng)完成的動作；to be playing則強(qiáng)調(diào)動詞不定式動作正在進(jìn)行。

答案：　B

 

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