问题

We should do our best to prevent the river from __________.
A:pollute
B:polluting
C:be polluted
D:being polluted;
B:polluting
C:be polluted
D:being polluted;
正确答案是:
同类题型
The old man is blind ___ the left eye
It”s nearly seven o”clock . Jack ____ . be here at any moment .
The 16th Asian Games started ________ November 12 th, 2010 in Guangzhou
Mr. Wu came into the classroom , abook in his hand.
Every afternoon a group of old women pass down the road outside my house._______ a load of firewood.