Which is true in these following situations?
A. 
When we found a big fire nearby， we should call 110 for help.
B. When there is a thief who is stealing things in the shop， we can call the police on 114.
C. When a car crashed into a tree in the evening， we need to call 120.
D. When a man suddenly felt very sick， we need to call 119 at once
“I saw him crossing the street.” The sentence structure is ______.
A. S+V+IO+DO B. S+V C. S+V+P D. S+V+DO+OC
----How many workers are there in your factory， Mr Brown?
----________ workers in our factory________ more than ________.
A. The number of; is; two hundreds
B. The number of; is; two hundred
C. A number of; are; two hundreds
D. The number of; are; two hundred
----What a terrible flood!
----Yes. We must try to prevent the flood ________ the fish in the river.
A. to save B. save C. of saving D. from saving
Unluckily， I was sitting at the table with smokers on ________side of me.
A. either B. both C . other D. all
_____ Amy met Peter， she with her mum _______ for the bus at the bus station.
A. When; were waiting B. When; was waiting
C. While; were waiting D. While; was waiting
