As a member of one world, each of us has a role _____ to make the earth a better place.
A．playingB．playC．playedD．to play
D

試題分析：句意：作為世界的一員，我們每個(gè)人都要發(fā)揮作用，使地球成為一個(gè)更好的地方�！癶ave sth. to do” 意為“有某事要做”，play a role:發(fā)揮作用；扮演一個(gè)角色。這里要跟 have sth. done 使某事、物被…, 和have sb. do,使/讓某人做某事區(qū)分開。故D正確。
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