Every means _____ prevent the water from _____.
#85804
A
are used to; polluting
B
will be used to; polluting
C
is used to; polluted
D
is used to; being polluted
推荐题目
_______ good for our health.
#43570
A
Do exercise is
B
Doing exercise is
C
Do exercises are
D
Doing exercises are
 Ten minutes ____ enough for me. 
#86171
A
is 
B
are 
C
am 
D
be