阿摩線上測驗
6. Lately many people have been discussing how to ensure______ water, food, energy, and other natural resources for a large world population.
(A) extreme
(B) individual
(C) respective
(D) sufficient
答案：登入後查看
統計： A(127), B(118), C(121), D(518), E(0) #1584551
統計： A(127), B(118), C(121), D(518), E(0) #1584551
