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 |
推荐套卷
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 |