练习册

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    1225] Too many natural materials since the beginning of this century. [译文] 自从本世纪开始.太多的自然资源已被利用. A. had been made use of B. were used C. have ben used of D. have been made use of [答案及简析] D. make use of的被动形式. 【查看更多】

     

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