阿摩線上測驗
31. The preservation of the natural ecology requires collective action to combat pollution and promote ________ practices.
(A) superficial
(B) sustainable
(C) superfluous
(D) suspicious
答案：登入後查看
統計： A(0), B(1), C(0), D(0), E(0) #3930664
統計： A(0), B(1), C(0), D(0), E(0) #3930664
