_________ across the railway, a train hit it.
#67607
A
While walking
B
Walking slowly
C
As the little pig walking
D
While the little pig was walking
推荐题目
Not only_______polluted but_______crowded.
#71566
A
was the city;were the streets
B
the city was;were the streets
C
was the city;the streets were
D
the city was;the streets were
We felt amazed at the use  the waste bottles.
#71625
A
they had made
B
they had made of
C
they had put
D
they had put to