Bài 4. Cho 10,8 gam kim loại R hoá trị x tác dụng với clo dư thì thu được 53,4 gam muối. Hãy xác định kim loại R đã dùng.

Câu 2 : Viết các PTHH thực hiện các chuyển đổi hoá học sau (ghi rõ điều kiện phản ứng nếu có)? Al -> Al2(SO4)3 -> AlCl3 -> Al(OH)3 -> Al2O3

Câu 1 (2 điểm): Nêu và giải thích hiện tượng xảy ra trong các thí nghiệm sau: 1) Cho một đinh sắt vào dung dịch CuCl2? 2) Cho ít dung dịch thuốc tím vào ống nghiệm đựng dung dịch NaOH, sau đó nhỏ từ từ dung dịch HCl đến dư vào ống nghiệm đó?

IV. Write the correct form or tense of the verbs in brackets.

1.   What should                                  (do) to preserve the local tradition?

2.   This used                           (be) the best restaurant in town.

3.   When her train got to the station, we                                (wait) on the platform.

4.   If you                                (go) to bed earlier, you                                   (not be) so tired.

5.   I only wish you                             (be) all as happy as I am.

6.   The doctor told him to stop                                  (smoke) and take a trip.

7.   He is so annoying! He                              (always/ leave) his things everywhere.

8.   I have decided                              (study) more and improve my overall average.

9.   As far as I know, he’s coining. But I                                (not speak) to him for weeks.

10. I will call you when the guests                             (arrive).

II.  Choose the word that has the main stress placed differently from the others.

1.   a. worthwhile              b. igloo                        c. habit                        d. practice

2.   a. obese                       b. dogsled                   c. extend                     d. remote

3.   a. household                b. suppose                   c. Arctic                      d. diet

4.   a. transformation         b. independence          c. understanding         d. illiterate

5.         a. uncontrollable          b. biological     c. particularly  d. seniority

I.    Choose the word whose underlined part is pronounced differently from the others.

1.   a.emotion                    b. indecisive                c.obesity                      d. believable

2.   a. hanging                    b. belong                     c. singer                       d. anger

3.   a. behaved                   b.passed                      c. entertained              d. changed

4.   a. imagination              b. average                    c. language                  d.appearance

5.   a. increase                    b.surprise                     c. release                      d. promise

1.   They often went to school by bike when they were young.

→  They used__________________________________________________________________

2.   She has taught her children to play piano for 4 years.

→  She started__________________________________________________________________

3.   It’s a pity I can’t cook as well as my mom.

→  I wish______________________________________________________________________

4.   He doesn’t have meals with his family any more.

→  He used____________________________________________________________________

5.   It took me a long time to be accustomed to living in the country.

→  It took me a long time to get____________________________________________________

6.   My school is near my home, so I go to school on foot every day.

→  My school isn’t______________________________________________________________

7.   I would like my sister to improve her English speaking.

→  I wish______________________________________________________________________

8.   Vietnamese people only eat dried candied fruit at Tet.

→  Dried candied fruit___________________________________________________________

VI.  Rewrite the following sentences using a wish construction.

1.   It’s a pity my computer is out of order.

      ___________________________________________________________________________

2.   I’d like my younger brother to concentrate more on his studies.

      ___________________________________________________________________________

3.   I’m sorry I don’t have time to go to the cinema with you.

      ___________________________________________________________________________

4.   It’s a pity John can’t come to my birthday party this weekend.

      ___________________________________________________________________________

5.   I d like you to take me to the zoo after school.

      ___________________________________________________________________________

6.   It’s a pity it is raining heavily outside.

      ___________________________________________________________________________

7.   It’s a pity my favorite book is out of stock.

      ___________________________________________________________________________

8.   I’m sorry I’m not old enough to drive a car.

      ___________________________________________________________________________

9.   It’s a pity they are having a class at the moment.

      ___________________________________________________________________________

10. It’s a pity my school doesn’t organize outdoor activities.

V.   Make up wishes from the prompts.

1.   I/ can afford/ new car.

      I wish______________________________________________________________________

2.   I/ not have to/ go/ school.

      I wish______________________________________________________________________

3.   I/ go camping/ friends.

      I wish______________________________________________________________________

4.   there/ be/ no more/ bullying/ school.

      I wish______________________________________________________________________

5.   I/ be dancing/ you/ the ballroom.

      I wish______________________________________________________________________

6.   no one/ be suffering/ depression.

      I wish______________________________________________________________________

7.   he/ can come/ party/ tonight.

      I wish______________________________________________________________________

8.   there/ snow/ Christmas.

      I wish______________________________________________________________________

9.   we/ be traveling/ first class.

      I wish______________________________________________________________________

10. they/ learn/ communicate/ their peers.

            I wish