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
---- Have we ________ water?  ---- Yes. We’d better get some. 
#74915
A
run out
B
run out of
C
run into
D
run across
Terry, please       your cell phone when Grandma is talking to you.
#64000
A
look up from
B
look into
C
look back on
D
look through
Universities have to provide student __________ for first-year students.
#82304
A
adjustment
B
qualification
C
commitment
D
accommodation