Study hard,      you’re sure to have a good result in the exam!
#38815
A
but
B
and
C
for
D
or
推荐题目
Why not _____your teacher for help when you can’t finish______the story by yourself.
#35634
A
to ask, write
B
to ask, writing
C
ask, writing
D
asking, to write
It’s _________ hard problem for the twins that ________ of them can work it out . 
#37180
A
so, neither
B
such a, none
C
so a, neither
D
such a, neither