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    Was important to build Great Green Walls all over the world? A. this B. that C. it D. he 【查看更多】

     

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    Was ________ important to build Great Green Walls all over the world?

    A. this 　　　　　　　　 B. that 　　　　　　　　 C. it 　　　　　　　　    D. he

     

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