Ask about the underlined parts.

1. My sister often complains about her (teachers).
2. It's (Betty) who always helps the poorest students in our class.
3. They are changing the whole scenery (next weekend).
4. Can you help her? She's looking for her (car keys).
5. They always buy at our shop (because it's cheap).
6. In his book he writes about (what they have at home).
7. Children often boast about what they have at home.
8. Mrs. Ravetti is spending her Christmas (in Spain) this year.
9. People often laugh at (Victor's) ideas but I know he will be a great inventor some day.
10. (Coffee) raises the blood pressure in your body.
11. They are preparing a party for about (20) people
12. Nigel usually listens to (rock and jazz) music.