6. She is going to build a new apartment here
7. The teacher tells a story. → …………………………………………………………………. 
8. The teacher told a story → ………………………………………………………………….
 9. The teacher has told a story → ………………………………………………
10. Somebody has taken my books away. → ………………………………………
11. Somebody takes my books away. → …………………………………
12. Somebody took my books away. 
13. They clean the wall before they paint it. → ………………………………………
14. They cleaned the wall before they painted it. → …………………………………………
15. Mr. Cole visited John at the weekend. → …………………………
16. Mr. Cole usually visits John at the weekend. → ……………………………………
17. Mr. Cole has visited John many times → ……………………………
18. Science and technology have completely changed human life. → 
19. They found the book on the floor → ……………………
20. They find the books in the desk → ………………………
21. They have found the keys in the drawer → …………………………
22. They don’t finish the work in time → …………………………
23. Do You finish the work in time ? → ……………………
24. Did You finish the work in time ? → …………………………
25. You finish the work in time → ………………………………
26. They didn’t call my name. → ……………………………
27. They don’t call my name → ………………………
28. They haven’t called my name → ……………………………
29. Has she written a poem? → ………………………… 
30. Has your mother made a big cake for the next party? → 
31. Did your mother make a big cake for the party? → 
32. Does your mother make a big cake for the party? → 
33. Please wait here until they examine your luggage → 
1. She is cleaning a window.
2. Nina is taking a photo.
3. Sam is learning English at the moment.
4. I am building my house.
5. They are writing a report now.
6. We are reading novels right now.
7. Someone is sweeping the floor.
8. I am doing my exercise now.
9. Somebody is singing my favorite songs now.
10. I am fixing my car.
1. I was reading books at 7 o’clock yesterday morning.
2. They were breaking television at 9 o’clock last night.
3. Nina was singing a song when you came.
4. While Ms. Nina was cleaning the house, she hurt her back.
5. They were decorating their house when you phoned.
6. I was eating a sandwich.
7. I was writing an important report.
8. She was not cleaning her room at 9 o’clock yesterday evening.
9. Mr. Sam was reading newspaper.
10. We were washing the dishes when you called.
1. You can't wash this dress.
2. You should open the wine about 3 hours before you use it.

VII. Rewrite the sentences keep the meaning unchanged

She is .............................................................

Children are ..........................................................

I find .........................................................

I think .................................................................

3 Put a suitable adjective from 2 in each blank. (Đặt một tính từ phù hợp từ bài 2 vào trong chỗ trống.)

4. Use the words in 1 and 3 to complete ... (Sử dụng những từ trong phần 1 và 3 để hoàn thành các câu. Nhớ sử dụng hình thức đúng của động từ.)

V.    Fill in the blank with a suitable word . 

Organic food is very popular these days. It can also be very (1)expensive . Some organic food costs twice as much as non-organic food. Parents of young children, and even some pet owners, will pay high prices for organic food if they think it's healthier. But many others think organic food is just a (2)  waste  of money.

There is one main (3)_________ between organic and non-organic food. Organic farms do not use agricultural chemicals such as pesticides that stop insects from damaging crops. In many (4)________ foods that claim to be organic must have special labels that guarantee they're grown organically.

Some people think organic also means "locally grown", and originally this was true. But over time organic farming has become big business, with many organic foods now being grown by large agricultural companies that sell their (5) ____________ far from where they're grown. Processed food made with organic ingredients has also become more popular. At first, only small companies produced these products. But as demand overtook supply, big food companies that had been selling non-organic products for many years also began selling organic products. Small organic food companies found it difficult to compete with these (6)________ companies, and many didn't stay in business much longer.