阿摩線上測驗
1. The government agency promised to _____ the water quality of this river by examining it twice a month.
(A) pollute
(B) monitor
(C) operate
(D) realize
答案：登入後查看
統計： A(31), B(217), C(20), D(17), E(0) #2509959
統計： A(31), B(217), C(20), D(17), E(0) #2509959
