Поставьте глаголы в скобках в правильную форму: 1. my sister (to be) three years old. 2. i (to have) two books. they (to be) interesting. 3. (to be) you a student? 4. mary (to have) a new bag. 5. i (to be) russian. 6. how old (to be) your brother. 7. peter (to have) many friends at the university. 8. what (to be) your friend's hobby. 9. we (to be) cambridge university students. 10. they (to have) two cousins.