Ex1:

1. travelled

2. bought

3. sent

4. studied

5. gave

6. were

7. rained

8. flew

9. wrote

10. baked

Ex2:

1. didn't come

2. wasn't

3. didn't like

4. didn't speak

5. didn't meet

6. didn't drive

7. didn't have

7. didn't understand

8. didn't receive

9. didn't cook

10. didn't go

Ex3:

1. When did Pam come home?

2. Where did you go after school?

3. Who ate a lot of sweets?

4. How many hours did Susan sleep yesterday?

5. How did Paul travel to France?

6. Who did Carol invite to her party?

7. How much did you spend on a T-shirt?

8. What time did your brother wake up?

9. What did ALan make lots of for dinner?

Ex4:

1. sang -> sing

2. studies -> study

3. didn't be -> weren't

4. runned -> ran

5. saw -> see

6. rainned -> rained

7. plaied -> played

8. didn't -> didn't do

1. my father travled to paris last week

2. I bought dictionary yesterday

3. peter sent an emeil

4. my mother studies french at school

5. gave

6. were

7. rained

8. flew

9. wrote

10. bake

mình xin lỗi ko làm tiếp đc, vì mình đi câu chuyện