2. How much is the eraser?

9. Yes　 10. lost　 11. is　 12. down / along　 13. Turn　 14. There　 15. welcome

12. He is writing with his pen. (提问)

Suggested answers:

11. Tom is a bus driver. (提问)

10. I can see two hundred apples on the tree. (提问)

9. He goes to the city by bus. (用by car改为选择问句)

8. These are old dresses. (变单数)

7. Jenny goes to school by taxi. (提问)

6. They are going to the market because they need to buy things. (提问)

5. His father works in a shop. (变否定句)