Thăm lăng Bác

          Dịp nghỉ lễ 30/4 và 1/5 năm ngoái bạn Minh được bố mẹ cho đi thăm lăng Bác tại thủ đô Hà Nội, xuất phát từ Phố Lu đi bằng ô tô theo tuyến cao tốc Hà Nội -Lào Cai. Lúc đi do đông xe và trời mưa nên bố bạn lái xe với vận tốc chậm nên thời gian đi mất 4 giờ. Lúc về do ít xe, trời nắng nên bố Minh lái xe với vận tốc nhanh hơn lúc đi là 20 km/h nên thời gian về ít hơn lúc đi là 1 giờ.

a) Câu hỏi 1: Viết công thức tính quãng đường s, với vận tốc v và thời gian t.

b) Câu hỏi 2: Gọi vận tốc của ô tô lúc đi là x (km/h), (x > 0).

Hãy lập phương trình về quãng đường và tính vận tốc của ô tô lúc đi và lúc về.

Làm giúp t xong để lại stk t cho 20k

my mother sent me a present yesterday

I was......

Part I. Choose the word, phrase or expression which best completes each sentence

1. It’s recommended that we become more concerned …… the environment around us.

    A. of                        B. to                            C. with                         D. about

2. Air ……., together littering, is cause many problems in our cities today.

    A. pollute                B. pollution                C. polluted                  D. polluting

3. On Christmas Eve, most big cities, especially London are .........with coloured lights across the streets and enormous Christmas trees.

    A. decorated          B. hang                       C. put                          D. made

4. In the United, there are 50 …….and six different time zones across the country.

    A. states                  B. nations                   C. towns                      D. show

5. Nowadays you still see the ………men wear kits (skirts) to wedding or other formal occasions.

    A. Scot                     B. Scotland                 C. Scots                       D. Scottish.

6. What …… we do to prevent these natural disasters?

    A. may                     B. ought                      C. should                    D. be able

7. …….. at someone is usually considered rude.

    A. Point                   B. To point                C. To pointing            D. Pointing

8. My father shouted at me, …….. made me feel sorrowful.

    A. that                     B. who                        C. whose                     D. which

9. I believe that our new manager has the …… to work well in this business environment.

    A. inflexible            B. flexibly                   C. flexibility                D. flexible

10.“Are Mary  and Peter still living in Paris?” - “No, they …….. to NewYork.”

   A. are just moved    B.had just moved       C. have just moved    D.will just move

11. ‘What is the  …….. of the USA ?’ – ‘The dollars.’

    A. current               B. population             C. territory                 D. currency

12. We can see many international programs ……………...different channels.

   A.in                               B.at                             C. on                            D. of

13. This hat  is different ..................... the one I had.

   A. for                        B. to                            C. from                        D. at

14. What will happen if the pollution .................. on.?

    A. puts                     B. goes                        C. keeps                      D. takes

15. He said  he was  afraid this article  was .................. date.

    A. over                                   B. on                            C. behind                    D. out of

16. I had to get up early, ...............I would miss the train.

    A. otherwise                       B. if not                      C. but                          D. unless

17. Most young people want to ........more about environmental problems.

    A.look after                        B.find out                   C.look for                    D.make out

18. ..................always gives me real pleasure.

A. I arrange flowers                                      B. The flowers are arranged

C. Arranging flowers                                     D. While arranging flowers.

19. Nga had difficulties in bringing the heavy box, and Mai, her friend, offered to help.

Mai : “Need a hand with your heavy box, Nga ?”  -Nga : “.....................”

A. I don’t need      B. Not at all        C. That’s very kind of you           D. No, thanks

20. Peter: “ ...............?”   Mary: “ Well , I’dlike to see that dress”

             A. Do you want anything                              B. May I help you

             C. What would you like                                D. What do you want to do

Cho 0,6 mol CuSO₄ trong 500ml dung dịch CuSO_{4 .} Tính nồng độ mol của dd CuSO₄

III. Choose the word or phrase which best completes each sentence. Write your answer (A, B, C, or D) in the numbered box. (4.0 points)

1. When I arrived at school, the school drum was _______.

A. ringing                   B. racing             C. cheering                       D. sounding

2. Sa Pa is in _________________ Vietnam.

A. north                      B. south                      C. southern                D. northern

3. The __________ can’t fix the washing machine until tomorrow.

A. repairman             B. walkman               C. chairman               D. postman

4. Would you mind if I ask you some personal questions?                   - __________

A. Please do              B. OK                         C. That’s right           D. Sure

5. “Who sings best in your school?”         - Mr. Quang _________________

A. sings                      B. is                           C. does                        D. was

6. Of my both sisters, Ms. Minh is _____________

A. taller                      B. the taller                C. the tallest              D. tall

7. “Happy new year” is a very famous song ________. It is sung most in the world.

A. sung by ABBA                                         B. singing by ABBA

C. was sung by ABBA                                 D. sings by ABBA

8.   Tom is very shy but his sister is outgoing.

            A. humorous             B. reserved                C. hard-working       D. sociable

9. Could you __________ me a favor?

A. help                       B. do                          C. make                       D. bring

10. Can I speak to Mary, please?   - Please __________

A. wait the phone                                         B. stay there for a minute                            C. hold on                                                    D. keep the phone

11. They visit a lot of monuments __________ the one- pillar pagoda. 

A. beside                    B. among                    C. between                 D. besides

12. Johnny was said _________________ the bright brilliant student in class.

A. was                        B. being                      C. being                     D. to be

13. Nobody will go there,  __________ ?

A. will they    B.  won’t he               C. will he                               D. won’t they

14. I couldn’t cut down the grass because the machines ____________ a few days ago.

A. broke down                                              B. have broken down

C. has broken down                                     D. break down

15. Let your name ____________ in the sheet of paper.

            A. to be written           B. write                    C. be written              D. wrote

16. Take the number 16 bus and get __________ at Bach Mai hospital.

            A. down                     B. off                         C. across                     D. on

17. The stolen pictures are ________________ a lot of money.

            A. worth                     B. cost                        C. price                      D. valued

18. He ______________ the bus ticket at home.

            A. took                       B. put                          C. brought                  D. left

19. Because he didn’t like the first pair of scissors, he asked for ______________.

            A. the other               B. the other ones      C. one another          D. another

20.   I have just bought __________________ from a book shop near here.

A. two beautiful black school leather bags    B. two beautiful leather black school bags

C. two beautiful black leather school bags D beautiful two black leather school bags    .

1. “I’m really happy about your improvement in English,” said the teacher.

   ðThe teacher told me that ................................................................................................

2. “Would you like to have some coffee?”, said Tom to Mary.        

ðTom invited Mary ........................................................................................................................

II. Use given words to rewrite the second sentence that has the meaning unchanged(10 points)

1. “I’m really happy about your improvement in English,” said the teacher.

   ðThe teacher told me that ................................................................................................

2. “Would you like to have some coffee?”, said Tom to Mary.        

ðTom invited Mary ........................................................................................................................

3.  They had bad marks because they were lazy.       

 ðThey were  ......................................................................................................................

4.   She moved to that house in 1973.                       

ðShe has  ...........................................................................................................................

5. They’ll have to change the date of the meeting again.                  

ðThe date  ........................................................................................................................................

6. Lama could not go to the beach with his friends because of his illness.   

 ðLama's illness  ..............................................................................................................................

7. It is pity that I cannot speak Japanese well.          

ðI wish  ..........................................................................................................................................

8. I haven't seen this film before.                               

ðThis is  .........................................................................................................................................

9. The bus takes longer than the train.                       

ðThe train does  ............................................................................................................................

10. I have never seen such a mess in my life!

ðNever in .........................................................................................................................................