Viết lại câu: 1. He spent lots of time doing this experimen ⇒It_____________________________________ 2. It took me all the morning to prepare for lunch ⇒I spent ___________________________ 3. Anna spent three days visiting VN ⇒It took _______________________ 4. It took my son three years to study in this college ⇒my son spent _______________________ 5. I spent two hours doing my home work ereryday ⇒It takes 6. They spent ten days painting this house ⇒It____________________________ 7. Last week , she spent 2 days tidying her room ⇒It _______________________________ 8. They used to go to school in half an hour ⇒It___________________________ ⇒They_________________________ 9. We 9ften spent 30 minutes reviewing our lesson before class ⇒It________________________ 10. It took him hours to fly from hanoi to london ⇒He____________________________