Here are the correct forms of the verbs to fill in the blanks:

1. There **are** twenty classrooms in my school.
2. Every morning my grandmother (have) **has** breakfast at 6.
3. Where is your mommy? She (cook) **is cooking** dinner in the kitchen.
4. We can't go out now. It (rain) **is raining**.
5. There (be) **is** a sofa in front of the window, but there (not be) **aren't** any pictures in this room.
6. Keep silent! The baby (sleep) **is sleeping** in the bedroom.
7. My brother (watch) **is watching** TV in the living room at present. He always (watch) **watches** TV in his free time.
8. I (should/buy) **should buy** this jacket?
9. Students (must/not/use) **must not use** phone when doing the test.
10. Your sister and brother (like) **like** ice cream?