6. Don't talk during the lesson.
7. Don't feed the animal in the zoo.
8, Read the instructions.
9. Don't be late for school.
10. Switch off your mobiles
$\color{lightblue}{\text{Choose the best answer}}$
1. A
2, C
3. A
4. D
5. C
6. D
7. A
8. B
$\color{darkblue}{\text{ĐỀ SỐ 5}}$
$\color{lightblue}{\text{Put the verbs in the brackets in Present Perfect tense}}$
1. have lived
2. have worked
3. has read
4. have known .
5. have not seen
6. have not worked
7. has not done.
