Exercise 4: Cho dạng đúng của động từ trong ngoặc ở thì hiện tại đơn.
1. Nurses and doctors **work** in hospitals.
2. This schoolbag **belongs** to Jim.
3. Does the performance **begin** at 7pm?
4. Sometimes, I **get** up before the sun **rises**.
5. Whenever she **is** in trouble, she **calls** me for help.
6. Dogs **have** better eyesight than humans.
7. She **speaks** four different languages.
8. The Garage Sale **opens** on 2nd of August and **finishes** on 4th of October.
9. She **is** a great teacher.
10. Who **does** this umbrella **belong** to?
11. Who **goes** to the theater once a month?
12. James often **skips** breakfast.
13. I rarely **do** morning exercises.
14. My cousin **has** a driving lesson once a week.
15. My father and I often **play** football with each other.

Exercise 5: Choose the best answer:
1. My father **is** a teacher. He works in a hospital.
- A. Is
2. I **like** rock music but my brothers don't like it.
- A. Likes
3. Workers always **wear** helmets for safety reasons.
- B. Wear