In the office an electrical engineer is looking through the instructions to know ________ the heat system works before the repair work.
#30344
A
whether
B
why
C
how
D
that
推荐题目
_____ the boy is determined to do something , no one can stop him.
#33101
A
Even if
B
Now that
C
Once
D
However
Nowadays teens prefer going to the cybercafé ，_____ ,as is known to us, they can chat with their friends by QQ or play games.
#34380
A
which
B
where
C
that
D
when
I think everyone should donate blood _____ he is healthy because that’s a citizen’s responsibility.
#31890
A
as if
B
as long as
C
now that
D
in order that
(2014·皖南八校联考)________ Yao Ming has retired from the NBA，the pleasure we have got by watching him play basketball at home and abroad will last long.
#30037
A
Although
B
If
C
Since
D
Once