She will tell us why she feels so strongly that each of us has a role____in making the earth a b...

问题描述:

She will tell us why she feels so strongly that each of us has a role____in making the earth a b...
She will tell us why she feels so strongly that each of us has a role____in making the earth a better place to live.A.to have played  B.to play C.to be played   D.to be playing 请给出详细分析!

B.to play
我们将扮演的角色.