He had to___ before they finished the course because they were not well disciplined.
#82834
A
drop in
B
drop out
C
drop off
D
drop by
推荐题目
 He goes to the gymnasium for physical training     day.
#64584
A
every each
B
every one
C
each other
D
every other
He has read lots of books,_____that he is still young.
#83195
A
considering
B
considered
C
being considered
D
to sonsider