Choose the best answer (A, B, C or D).

 1. Thank you. This information ________ me a lot.

    A. helps                   B. benefits                   C. volunteer          D. A + B

 2. All of these books and clothes will be ________ to children in Ha Giang.

    A. encouraged           B. donated                C. clean                D. All are correct.

 3. My mom often asks me to ________ my room on the weekend.

   A. stay                      B. volunteer                C. make                       D. clean up

4. Students often make postcards and sell them to ________ to help the poor.

   A. raises                   B. raise funds              C. raise money           D. Both B & C

5. Try to study harder and be more active to ________ your life.

  A. make a difference     B. raise money        C. clean up                  D. improve

6. My sister works as a volunteer at a _______ in the city.

   A. donate                        B. shelter               C. community              D. homeless

7. Nowadays, a lot of ________ live in a nursing home.

  A. homeless people        B. elderly people   C. street children           D. disabled people.

8. There are a lot of ________ after the storm.

  A. homeless people        B. elderly people   C. nursing home           D. None are correct.

9. We ____ to the cinema last night.

  A. go                              B. went                  C. have gone                D. has gone

10. We ____ 2 hours reading Physics books yesterday.

  A. spent                          B. spend                 C. was spent                D. had spend

11. Trang ____ me 20 minutes ago.

  A. phones                      B. phoned               C. had phoned          D. has phoning

12. I wish I _____ his name.

  A. know                       B. knew                    C. known               D. had knew

13. John was reading a book when I ____ him.

  A. seen                       B. had saw                 C. had seen           D. saw

14. Yesterday, I _____ to the restaurant with a client.

   A. gone                    B. go                           C. went               D. was gone

15. What ___ you do last night?

   A. did                       B. do                           C. will                 D. should

16. We are collecting ………………… and clothes for street children.

  A. dirty                     B. blood                      C. rubbish                    D. blankets

17. …………… did you go to school three years ago? – By bike.

  A. How                     B. Where                     C. How much              D. How many

18. We can help to reduce ……. by using public transportation, biking and walking.

   A. air pollution         B. water pollution       C. social problems       D. community service

19. Most people volunteer …… they want to make a difference in their community.

  A. because                 B. so                            C. so that                     D. in order to

20. To prepare for the new year, I ­­­­­­­……………. my house again since last month.

  A. paint                     B. painted                   C. have painted           D. has painted

ai giúp với, làm bài có 8đ mà ko bt sai chỗ nào.

phep chieu vuong goc la phep chieu co cac tia chieu

Cho tam giác ABC. Gọi a là một số thực tùy ý, a#0 và a#1. Tập hợp các điểm M sao cho  vecto MA= (a-1).vectoAB-a.vectoAC nằm trên ?Giải ra giú em với ạ

A.một đoạn thẳng                B.Đường tròn bán kình R= |a|

C.đường tròn bán kình R= 1+ |a|      D.một đường thẳng