阿摩線上測驗
53.There are many small and practical ways you can ________ energy and help protect the environment.
(A) conserve
(B) observe
(C) deserve
(D) serve
答案：登入後查看
統計： A(57), B(20), C(8), D(5), E(0) #664968
統計： A(57), B(20), C(8), D(5), E(0) #664968
