(in the box, found, an, it's, be, you, how, excuse, please, call, key )
1. Is that ______ watch?
2. What ______ your telephone number?
3. Is that your book in the lost and ______ case?
4. Please ______ Gina at 236-5698.
5. —What's this? 
   —______ a pencil case.
6. I lost a set of ______.
7. He has (有) ______ English book.
8. ______ do you spell "pen"?
9. ______ me! Is this your watch?
10. What's your name, ______?