Although he failed when he tried doing the experiment for the first time, he decided to try it____.
#70436
A
once in a while
B
at once
C
once more
D
once
推荐题目
It is uncommon that she is a person ___________up late . 
#73481
A
accustomed to stay
B
accustomed to staying
C
used to stay
D
addicted to stay
It is difficult for us to ______  our conversation with all this noise around us.
#71850
A
carry on
B
account for
C
bring up
D
get across