要求：词数80左右，可以用used to的句型。
Changes in My Hometown
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One possible version:
Changes in My Hometown
Great changes have taken place in my hometown these years. There used to be old and low houses on the streets,but now you can see people live and work in tall buildings. In the past, you could always see rubbish everywhere. But now the environment is clean and tidy. Many trees are planted on both sides of the street, so the air is very fresh.There were not any buses in my hometown, so most of us used to walk to work or go to school by bike.However, life is much better now. Many people buy their own cars, so they go out by car.
