B.

1. Were there any apples in the fridge yesterday

2. We didn't talk on the telephone last Sunday.

3. Did the children play football in the yard last Sunday

4. Many people decorate their homes at Christmas.

5. Did she receive a letter from David yesterday

6. What did you buy for your friends on your last vacation

C.

1. walked to work

2. was given a gift by me on her birthday

3. is a garden in Loan's house

4. did Paul's laptop cost

5. half a day going to Hue by bus

6. good at English

---

Ex1

1. Don't make

2. Take

3. Put

4. Close

5. Chew

6. Don't smoke

7. Don't touch

8. Read

Ex2

1. Keep silent, please!

2. Go outside and play sports!

3. Study harder!

4. Be careful!

5. Don't tease them!

Ex3

1. must

2. must

3. mustn't

4. mustn't

5. mustn't

6. must

7. must

8. mustn't

9. must

10. mustn't

B,

1.

Were there any apples in the fridge yesterday

2.

We didn't talk on the telephone last Sunday.

3.

Did the children play football in the yard last Sunday

4.

Many people decorate their homes at Christmas.

5.

Did she receive a letter from David yesterday

6.

What did you buy for your friends on your last vacation

C,

1. walked to work                          2. was given a gift by me on her birthday

3. is a garden in Loan's house

4. did Paul's laptop cost                     5. half a day going to Hue by bus

                 6. good at English

Ex1 :

1. Don't make                     2. Take

3. Put                               4. Close

5. Chew                           6. Don't smoke

7. Don't touch                                  8. Read

Ex2 :

1. Keep silent, please!

2. Go outside and play sports!

3. Study harder!

4. Be careful!

5. Don't tease them!

Ex3 :

1. must                           2. must

3. mustn't                               4. mustn't

5. mustn't                                6. must

7. must                             8. mustn't

9. must                                     10. mustn't

→ Must : phải

→Mustn't : Ko dc

$@Lucy$