20. To prevent sewage from entering the waterways and protect public health, the city councilman strongly demanded that the sewage system _________ in three months.
(A)improved 
(B)to improve 
(C)was improved 
(D)be improved

答案：登入後查看
統計： A(74), B(110), C(130), D(462), E(0) #537111

詳解 (共 4 筆)

#1108284
原句that the  sewage system should be improved in three months.
should省略
14
0
#2472781
demand that (should)...
(共 28 字，隱藏中）
前往觀看
13
0
#3466579
為了防止污水進入水道並保護公眾健康，市議...
(共 39 字，隱藏中）
前往觀看
5
0
#962525
為何呢？
1
0