I. Mixed tenses
1. The kids (sleep)..............when the bell rang.
2. Mu mother(wash)...........the dishes while we (clean).......the floor.
3. Farmers often (harvest)............their crops in August.
4. They (leave).........Ha Noi for HCM City yeasterday.
5. They (live)...........in this streer for a long time.
6. She rarely (take)............a bath before dinner.
7. He(not finish)................doing it yet.
8. What.............you(do)............at 10am yesterday?
9. She (finish) ..................her homework recently.
10. The farmer (work)................in the field now.
11. John (see).................that film sometimes.
12. My brother (use)...............this computer for 2 years.
13. Mr. Green (buy) .............a new tractor last month.
14. When I was young, I (want)..................... to be a bus driver.
15. Trang (not be) ..............in her room at the moment. She (cook)...... in the kitchen.
16. Viet Nam (have) .............. a lot of mountains and there (be) ........ many tall and big trees there.