1. Lan sweeps the floor every day. (passive voice) 2. They don't like learning Maths. (use " interested") 3. He got bad marks because he was lazy. (Because of) 4. Although it rained heavily, they went to the zoo. (Use : "but") 5. We are doing our homework at the moment. ( Passive voice) 6. Although they were tired, they went to bed late. ( In spite of) 7. There wasn't much air pollution when I was small. (use to) 8. How far is it from Vung Tau to Ho Chi Minh city? --> What...? 9. We will use solar energy to solve the problem of energy shortage. (Passive) 10. These are his shoes. (Use Possessive pronouns)