1. It’s known that air (consist) …consists……mainly of nitrogen and oxygen.
2. Minh used to drink a lot of milk but today she (prefer) …prefers…. Tea.
3. We (think) …think..it necessary for you to sell your car. You (not/use) …don't use .it very often.
4. His brother (think)…thinks .of selling his motor. Would you be interested in buying it?
5. He told her his name but she (not / remember) doesn't remember..now.
6. Duy says he’s 60 years old now but no one (believe) ……believes……him.
7. Who is the man over there? Why (he / look) …does he look..at me?
8. Who is the girl sitting on that bench? What (she / want)……does she want…..?
9. Are you thirsty? (you / want) Do you want…..something to drink?
10. Kaka is interested in politics but he (not / belong) …doesn't belong……..to a political party