We’ve failed three times in the experiment,so we’ll have to do it       time.
#14520
A
four
B
a fourth
C
fourth
D
the fourth
推荐题目
The teacher asked a very difficult question. It was Ted who finally ____ a good answer.
#13390
A
came up with 
B
kept up with
C
came up
D
caught up with
She did it ________ it took me.
#14553
A
one third the time
B
the one-third time
C
one-third a time
D
a one-third time