动词的时态、语态
练习题基础预习：
一、用所给单词的适当形式填空
1. I think high school students should__________ (give) pocket money.
2. The earth ________ (go) around the sun.
3. Black tea____________ (invent) in China more than 600 years ago.
4. There ________ (be) more than 50 schools in our city next year.
5. Parking ____________ (not allow) here
6. I __________ (have) this bike for more than two years
二、单句改错
1. I buy a new shirt yesterday.______________
2. When we reach there, they work for a long time.______________
3.  ...