人教版英语书六年级下册Unit4A部分课后答案

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There was only one small building 

on a hill.There was no library 

in his school.There were no 

computers or Internet in his school.

There was a small building in my school 

five years ago.

There wasn't a library. There were no 

computers.

There is a big building in my school now.

And there is a new library. There are many computers.

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At that time，there were no post offices，cafes，gyms，motels or cinemas. 

People didn't go by bike or bus. People couldn't use traffic lights.