问题

Every means ______ prevent the water from ______
A:are used to; polluting
B:is used to; polluting
C:is used to; polluted
D:is used to; being polluted
B:is used to; polluting
C:is used to; polluted
D:is used to; being polluted
正确答案是:
同类题型
Are you sure ____ you have seen this man?—Yes, I’m quite sure ___that.
You promised to _____ the goods to our place immediately, but we haven’t seen any of them yet.[ ]
We were sad to learn that several studentswere by a caryesterday
30Because of the heavy snow, a serious accident______to the family