I think walking is good          our health.
#50587
A
at
B
with
C
for
D
so
推荐题目
We live_________ the second floor _________a flat.
#46484
A
at; in
B
on; at
C
on; in
D
in; on
---How do you usually go to school?----________
#48173
A
By a bus.
B
On foot.
C
On bike.
D
with car