Unit 1 Could you please clean your room?
Unit 2 Why don't you talk to your parents?
Unit 3 What were you doing when the rainstorm came?
Unit 4 An old man tried to move the mountains.
Unit 5 What's the highest mountain in the world?
Unit 6 Have you read Treasure Island yet?
Unit 7 Have you ever been to a museum?
Unit 8 I've had this bike for three years.