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(15), B(168), C(16), D(9), E(0) #2510369

詳解 (共 1 筆)

#4370867
The government agenc...
(共 217 字，隱藏中）
前往觀看
6
1