Exercise 3:

2, I am pleased that you want to know more.

3, Ba was taking a shower at 8.00 last night.

4, It is difficult to learn English.

5, I want to borrow your dictionary.

6, They were playing tennis at 10.30 yesterday morning.

7, Bao is always forgetting his homework.

8, Last week, she had an English test on Friday.

9, The school festival was held in the yard last week.

10, In the rice cooking festival, fire was made in the traditional way.

Exercise 4:

1, B-was

2, B – not to be

3, D – if I had

4, A – burnt

5, A – to go

6, B – wonders

7, C – carried

8, B – regularly

9, D – claim

10, D – was built

Chúc bạn sức khỏe và học tốt nha!