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
I think it is really____ worth_____ my advice on returning the amber room to Russia.
#22213
A
very; considering
B
well; considering
C
very; to consider
D
well; to consider
 He said it was _____ impossible to buy the novel which was _____ worth reading.
#24850
A
very…very
B
very…quite
C
much…much
D
quite…well