1. There are three books in my backpack. One is a maths book and ________ is a chemistry book.

2. Customer: I see. Anything ________ ?

3. There are several holidays in Brazil. One is Independence Day and ________ are Children's Day and Teacher's Day.

4. Your composition is full of ________ .

5. Don't blame yourself, it's not your ________ !

6. Look! The attic window is broken, the ________ has probably come inside this way.

7. There is a ________ in this office. Small things from my desk disappear very often.

8. I have two pencils. One is black, ________ is blue.

9. Customer: And what do you think is ________ with it?

10. I can understand your Spanish in spite of the grammar ________ you make.