Teachers should ___them to continue studying when some students want to give it up. 
#75047
A
encourage
B
keep
C
prevent
D
make
推荐题目
Not having work out the problem,          leave the office.
#63683
A
so he was not allowed to
B
and he didn’t want to
C
the teacher couldn’t make him
D
he couldn’t free himself to
. --- I'm sorry. I ____________ the bike to you yesterday. But I was too busy at that time. --- Never mind.
#63320
A
should return
B
should have returned
C
must return
D
may have returned
---Must I finish my homework now ?  ---No, you ________
#74373
A
shouldn’t
B
mustn’t
C
needn’t
D
can’t