1. What he bought for your birthday is a dictionary. 

　　2. Put the magazine where it was，Tom.

　　3. After living in Paris for fifty years，he returned to the small town where he grew up as a child. 

　　4. There is not much difference between the two. 

　　5. Alice has to finish her work now，doesn’t she？

　　6.I have not decided what to write about.

　　7. Think hard，and you will work out the math problem. 

　　8. It is not easy to walk against a strong wind.

　　9. Why don’t you try writing a funny poem？ 

　　10. We should keep our classroom clean and tidy every day.