Question 1: 1. B between

2. D stopped

3. B should

4. C painful

5. D sailed

6. A improve

Question 2: 1. D so

2. A either

3. B fruit

4. C would

5. C was

6. A playing

7. A at the moment

8. B taller

9. D by

10. A Did you eat

11. C to drive

12. C weren't

13. A from

14. A would better

15. B unhealthy

16. A Don't stay

17. B how

18. B happily

19. C Yes, let's

20. D well

Question 3: 1. B She is studying Math

2. D She has her Math classes on Wednesday and Friday.

3. She has two classes.

4. She thinks English is interesting and important.

IV/ 1. D The boys are studying Math now.

2. D Math is a difficult subject.

3. B Do children have classes in the morning?

Exercise 5:

Questions: 1. It is more than 30 kms from Hoi An to Da Nang.

2. It is famous for old temples, pagodas, tiled roof houses and narrow streets.

3. Yes they can.

4. Hoi  An was recognized as a World Heritage Site in 1999.

Rewrite the sentences. 1. Your house is smaller than mine.

2. The red car is more expensive than the black one.

3. The bathroom has a sink, a tub and a shower.

4. Trung is the tallest in his class.

5. Is this the best hat?

6. No houses on the street is older than my house.

7. What an excellent girl!

8. It is ten to two. 

9. Where do you live?

10. It is hard to find an apartment in a big city.

11. Our summer vacation lasts two months.

12. Will you please take care of the house while we're away?

13. American students have more vacations than Vietnamese one.

14. I spend two hours each day doing my homework.

15. Hoa studies hard.

16. It takes me half an hour to get to work.

17. Is this the cheapest computer?

18. How much does this dictionary cost?

19. You don't have to finish the work today.

20. Tim's collection has over eight hundred stamps.

21. What is the height of the Big Ben Clock Tower?

22. How heavy is your son?

23. How much does this face mask cost?

24. What is the length of the Mekong River?

25. What is the width of the west Lake?

26. This is the first time I saw the sharks.