选择方框中的动词词组并用其适当形式填空。
taken place, give back, knocked into ,Learning ….by themselves slow down |
1. When you see the red lights , you should ______ .
2. Have you ________ the book you found?
3.Great changes have __________________ in the last few years in China .
4. The rabbit a tree and died.
5. They prefer to listening to the teacher