1. Thank you for your        (value) help and practical advice.

2. It gives us much        (please) to welcome our new teacher.

3. We are looking forward to        (visit) Shanghai World Expo.

4. Thanks for your         (invite). I'll be here in no time.

5. This was one of the worst         (nature) disaster in the history of the United States.

6. Students at school shouldn't get their ears        ( pierce).

7. Jack said that he         (return) the two books to the library in a week.

8. We should do everything we can         (protect) the environment.

9. Bangkok, the capital of Thailand,        (know) as the "City of Angels",