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____________________________