Learning to write is learning to think. You don’t know things clearly _______ you can write them down.
#56362
A
unless
B
if
C
since
D
whether
推荐题目
_______ Peter is old and weak, he still has to work.
#58030
A
But
B
Even though
C
So
D
Because of
Grace Brown __________ play tennis every day.
#58071
A
isn‘t
B
don’t
C
aren’t
D
doesn’t.
 –______is the jacket?   –It’s green.
#56075
A
Where
B
How
C
What’s
D
What color