Mary often studies English by _______ with a group.
#49704
A
working
B
work
C
to work
D
worked
推荐题目
They usually go home ____________.
#49192
A
by a bus
B
on a bus
C
by bus
D
on bus
It’s important _________ us _________ some good friends.
#47232
A
for, having
B
of, to have
C
for, to have
D
of, having