用括号中所给单词的适当形式填空.

1. I'd like a pair of _____, please (shoe).

2. Don't forget _____ (lock) the door if you are the last person to leave.

3. They talked on and on very _____ (happy).

4. The best way _____ (improve) your English is to join an English club.

5. The _____ are building a tall building. (work)

6. She is 70years old.She _____ (use) to be a pilot.

7. This bag isn't Lucy's , It's _____ sister's . (she)

8. It _____ (seem) that Tom has changed a lot.

9. The first lesson is the _____ of all. (easy)

10. Have you _____ (do) your chores? We are _____ (leave) in an hour.