______ 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
In Australia, surfing is a popular sport among young people ____ they can seek excitement and adventure.
#66714
A
that
B
which
C
where
D
how
In peace, too , the Red Cross is expected to send help _________there is human suffering.
#68087
A
whoever
B
however
C
whatever
D
wherever
My favorite film star is Jack Cheng, performances always make people laugh.
#69297
A
whose
B
as
C
which
D
why
------Is that the small company you often refer to?-----Right,just the one ______you know I used to work for years.
#74332
A
that
B
which
C
as
D
where
Alice received an invitation from her boss,__________came as a surprise.
#71835
A
it
B
that
C
which
D
he