问题补充:
These rivers should be prevented .
A. to be polluted
B. from being polluted
C. polluting
D. being polluted
答案:
A. to be polluted
(答案→)B. from being polluted
C. polluting
D. being polluted
解析:可联系答.案.网客服索取。
时间:2022-01-11 18:46:09
These rivers should be prevented .
A. to be polluted
B. from being polluted
C. polluting
D. being polluted
A. to be polluted
(答案→)B. from being polluted
C. polluting
D. being polluted
解析:可联系答.案.网客服索取。