To understand the grammar of the sentence, you must break it       into parts. 
#24700
A
down
B
up
C
off
D
out
推荐题目
Peter’s jacket looked just the same as Jack’s, but it cost          his.  
#25030
A
as much twice as
B
twice as much as
C
much as twice as
D
as twice much as
We were late, ________ the film wasn’t very good.
#24403
A
anyhow
B
actually
C
however
D
though