______ environmental damage is done, it takes many years for the ecosystem to recover.
#73217
A
Even if
B
If only
C
While
D
Once
推荐题目
I felt most angry about the way ______ I was treated when I was shopping.
#69050
A
when
B
that
C
which
D
where
However _______, it’s worth it and I’ll get it .
#67730
A
the watch costs
B
much the watch costs
C
the watch will cost
D
much does the watch cost
Xiao Li was about to cheat in the exam ________ the teacher came up, smiling to him.
#69571
A
as
B
when
C
while
D
until
_______ Japan’s nuclear crisis (核危机) will be solved in 2011 is not known yet.
#68693
A
That
B
If
C
Whether
D
What