His friends go to Beidaihe by train _______vacation every year.
#48849
A
at
B
of
C
on
D
in
推荐题目
---Please turn off the light. ---OK, Mom. I won’t leave the room ______ the light _____.
#48468
A
when; on
B
with; on
C
with; off
D
when; off
I have problems _______many things. For example, I have problems ________ learning Maths well.
#50382
A
with, in
B
about, with
C
in, with
D
in, about
