VI. Complete the sentences with a suitable preposition. (10) 1. My uncle is not available. He is work. 2. The newcomer is very unfriendly. He hardly ever starts a conversation us. 3. My cousin is an extrovert and sociable girl. Shes is very good making friends 4. the five books, the red thick one is the most expensive. 5. See me half past five Friday morning the cafeteria in of the National bank. 6. Doctors take care sick people. 7. John is a volunteer teacher from the USA. Hes looking a flat in Hanoi for his family.