I won't help him except ___ he gives me back that CD I lent him.
.I won’t help him except ___ he gives me back that CD I lent him.
A what B if Cwhether D unless
为什么选B
We have already found a way to prent the harmful gas from spreading.
A I can't agree with you more
B I quite agree with you
C You can't be too careful,though
为什么选C