What did you do at 5 o'clock yesterday? (тут Past Simple, потому что есть yesterday)
He walks every evening (тут Present Simple, потому что есть every evening)
I think, he entered the University. (здесь не очень понятно, что писать, потому что нет слов, показывающих на время и тут всё зависит от контекста, но я поставила Past Simple)
We are meeting at 3:00 tomorrow (здесь Present Continuous, потому что тут запланированное действие (100% вероятность)
He has been doing homework for 2 hours (здесь я вставила Present Perfect Continuous, потому что тут есть for)
They built a house last year (тут Past Simple, потому что есть last year)
He has just learnt a poem (здесь Present Perfect, потому что есть just)
1. There isn't a box under my bed.
2. There is a cat on the closet.
3. There are two dogs in the room.
4. There are many CDs in the box.
5. There isn't a computer on the desk.
6. There is a lamp near the bed.
7. There aren't three jackets in the wardrobe.
8. There are two pillows on the bed.
9. There is a kite in the room.
10. There are three pencils in the pencil case.
11. There are many oranges in the tree.
12. There is an umbrella in the car.
13. There are three men in the shop.
14. There are ten students in the living room.
15. There is a dog in the garden.
16. There is a cup on my desk.
17. There are ten English books in the room.
18. There are two rubbers in the cupboard.
19. There are two computers in my office.
20. There is a calendar on the wall.