bán kính vành ngoài của một ô tô là 25cm. Xe chạy với tốc độ góc 10 rad/s. Tốc độ dài của chất điểm là

Put the verbs in brackets in suitable tense:

1. I (have) __________ coffee for breakfast every day.

2. They (begin) __________ to study at this school 7 years ago.

3. It (rain) rains very much in the summer.

4. Bad students never (work) word hard.

5. He (visit)______ his friend yesterday and (find) ______ that he had been out.

6. She sometimes (buy) ___________ vegetables at his market.

7. I have not seen John for a long time. I (see) __________ him 3 weeks ago.

8. It (be) is very cold now.

9. I (need) need some money for my textbooks.

10. Tom (like) likes to go to the museums.

11. He (read) __________ that novel again during his last vacation.

12. I often (leave) leave the city at weekends.

13.The sun (set)___________ in the west.

14. My friend (study) __________ English for an hour every night.

15. Honesty (is) __________ the best policy.

16. The earth (move) __________ round the sun.

17. Two and two (make) __________ four.

18. We (watch) __________ a good programme on TV last night.

19. Mary (love) loves ice-cream.

20. I (have) __________ a little trouble with my car last week.

21. We always (do) do our exercises carefully.

22. I (meet) __________ Mary last night. She’s become a very big girl.

23. She (go) __________ to school every day.

24. What he (do)_________last night ?

25. We seldom (eat) eat before 6.30.

26. She (lose) __________ her handbag on the train yesterday morning.

27. When he grew old, he often (think) ________ of all the things he had done when he (be) _________ young.

28. I always (tell) _______ you to comb your hair, but you never (do) ____ what I (say) _____ .

29. When I (hear) _______ a knock at the door last night, I (walk) ___________ to the door and (open) ___________ it. When I (open) _________the door, I (see) ________my brother. I (greet) ________ him and (ask) _______ him to come in.

30. I (see) _______ you in the school play last night. You (do) _______ a terrific acting job. Had you ever acted in a play before this one?

-Yes, I (start) _________ acting when I was in elementary school.