介绍:
Unit4
1. Did you used to play football?
2. He used to be very strong.
3. She used to work in a bookstore.
4. There used to be a flowerbed here.
5. Jenny didn't use to make those mistake.
6. Life now is much easier than it used to be.
7. My parents used to live a quiet life in the country.
8. I used to read English for half an hour in the morning.
