The rivers will become dirtier and dirtier ______ we take action to protect them.
#56392
A
since
B
if
C
until
D
unless
推荐题目
_______ bad weather _______ me, I will go for a walk every day. I think health is the most important.
#58404
A
If; stops
B
Because; will stop
C
Unless; stops
D
As; will stop
________ the story of The Little Prince is very simple, it warms people in many ways.
#56028
A
When
B
Although
C
If
D
Because