Give the correct form of the verbs.

1. She usually (read) _________________books in her free time.          

2. In the future, robots (be able / guard) ______________________ our houses.

3. Yesterday, Hoa (receive) _________________ a letter from Nick.               

4. Alexander Graham Bell (invent) _________________ the telephone in 1876.

5. Paul: How old (you / be) _________________on your next birthday?

    Jane: 14 years old. And I (invite) ____________some of my close friends to my birthday party in a cafe.

6. We ought to (help) _________________ our parents with the housework.       

7. If it rains this evening, we (not go) ___________________ out.   

8. My children love (watch)___________________ cartoon films.  

9. Mr. Huy (work)__________________  for this company for seven years.  

10. (you / join)__________their trip last week? – No. I was busy with (take) _______ the final exam.

11. I (learn)_________________ English since I (be)___________in grade 3.