1. Jim has recently experienced the life of ethnic people in Vietnam. (make a question)
……………………………………………………………………………..?
2. The ethnic minorities in Vietnam often live in mountainous areas.
……………………………………………………………………………..?
3. Their costumes are colorful and unique.
…………………………………………………………….......................?
4.They often gather together at the communal house in special occasions.
……………………………………………………………………………..?
5. The chief of the community often tells tales of heroes to the people at the communal house
……………………………………………………………………………….?
6. Ethnic people often hold festivals in spring.
………………………………………………………………………………?
7. Life in the mountainous areas is quite difficult because of the extreme weather.
………………………………………………………………………………?
8. In the remote areas, it may take people half a day to travel from their house to the market.
…………………………………………………………………………?
9. Shortage in electricity and fresh water supply makes life in remote areas so difficult.
……………………………………………………………………………..………?
10.The local authorities try to help the ethnic minorities by teaching them effective farming methods.
……………………………………………………………………………………………?

III. Combine each pair of sentences using the conjunction in brackets.
1. The world is getting warmer. Polar bears are in danger of becoming extinct. (because)
_______________________________________________________________________
2. There weren’t enough students. They closed the village school. (as)
_______________________________________________________________________
3. I really enjoyed the concert. The music was too loud. (although)
_______________________________________________________________________
4. He got a cream pie smashed in his face. Everyone laughed. (when)
_______________________________________________________________________
5. Paul was walking to the bus stop. He found somebody’s wallet on the ground. (while)
_______________________________________________________________________
6. Unless he phones her immediately, he won’t get any information.
If ______________________________________________________________________
7. You study for the test. You will do much better. (if)
_______________________________________________________________________
8. Rex practiced his guitar. He could play the song perfectly. (until)
_______________________________________________________________________
9. We could get back to shore. It started to rain hard. (before)
_______________________________________________________________________
10. I saw him. He was always carrying a plastic shopping bag. (whenever)
_______________________________________________________________________
IV. Rewrite the sentence using the word in brackets.
1. It’s impolite of them to wear hats in the pagoda. (shouldn’t)
__________________________________________________________________________
2. Is it necessary for me to tip in a coffee shop? (have to)
__________________________________________________________________________
3. It isn’t necessary for staff to wear vests in their company. (need)
__________________________________________________________________________
4. It’s good for us to keep our traditional customs. (should)
__________________________________________________________________________
5. It’s really important to remove your shoes when entering a temple. (must)
__________________________________________________________________________
6. Photography is not allowed at some sacred places. (mustn’t)
__________________________________________________________________________

1. Jim has recently experienced the life of ethnic people in Vietnam. (make a question)
……………………………………………………………………………..?
2. The ethnic minorities in Vietnam often live in mountainous areas.
……………………………………………………………………………..?
3. Their costumes are colorful and unique.
…………………………………………………………….......................?
4.They often gather together at the communal house in special occasions.
……………………………………………………………………………..?
5. The chief of the community often tells tales of heroes to the people at the communal house
……………………………………………………………………………….?
6. Ethnic people often hold festivals in spring.
………………………………………………………………………………?
7. Life in the mountainous areas is quite difficult because of the extreme weather.
………………………………………………………………………………?
8. In the remote areas, it may take people half a day to travel from their house to the market.
…………………………………………………………………………?
9. Shortage in electricity and fresh water supply makes life in remote areas so difficult.
……………………………………………………………………………..………?
10.The local authorities try to help the ethnic minorities by teaching them effective farming methods.
……………………………………………………………………………………………?

1. She likes to hang out with friends on Saturday evening.
She’s interested_________________________________________________________________
2. She only allows her children to watch television at weekends.
She only lets ___________________________________________________________________
3. Could you help me with this box?
Would you ____________________________________________________________________
4. DIY skills aren’t as hard to learn as I think.
DIY skills are __________________________________________________________________
5. Who will take care of the garden while you are away?
Who will look__________________________________________________________________
6. My house is smaller than my parent’s house.
My parent’s house___________________________________________________
7. The black dress is more expensive than the red one.
The red dress ______________________________________________________
8. Is Jim worse at Math than John?
Is John____________________________________________________________
9. Jim looks much younger than his classmates.
Jim’s classmates____________________________________________________
10. My father’s explanation about the subject was clearer than my brother’s. (clearly)
My father explained the subject _____________________________________.
11. Her old house is bigger than her new one.
Her new house_________________________________________________
12. No one in my class is taller than Peter.
Peter_________________________________________________________
13. The black dress is more expensive than the white one.
The white dress_________________________________________________
14. According to me, English is easier than Maths.
According to me, Maths _________________________________________
15. No one in my group is more intelligent than Mary.
Mary________________________________________________________

1. She likes to hang out with friends on Saturday evening.
She’s interested_________________________________________________________________
2. She only allows her children to watch television at weekends.
She only lets ___________________________________________________________________
3. Could you help me with this box?
Would you ____________________________________________________________________
4. DIY skills aren’t as hard to learn as I think.
DIY skills are __________________________________________________________________
5. Who will take care of the garden while you are away?
Who will look__________________________________________________________________
6. My house is smaller than my parent’s house.
My parent’s house___________________________________________________
7. The black dress is more expensive than the red one.
The red dress ______________________________________________________
8. Is Jim worse at Math than John?
Is John____________________________________________________________
9. Jim looks much younger than his classmates.
Jim’s classmates____________________________________________________
10. My father’s explanation about the subject was clearer than my brother’s. (clearly)
My father explained the subject _____________________________________.
11. Her old house is bigger than her new one.
Her new house_________________________________________________
12. No one in my class is taller than Peter.
Peter_________________________________________________________
13. The black dress is more expensive than the white one.
The white dress_________________________________________________
14. According to me, English is easier than Maths.
According to me, Maths _________________________________________
15. No one in my group is more intelligent than Mary.
Mary________________________________________________________

bạn ơi sai đê kìa mà đừng cà khịa người khác nhìn lại mình đi

Ta có: 

x là hóa trị của SO4==> x= 2

y là hóa trị của Fe==> y =3 hoặc y=2

Do x, y khác nhau

=> y=3

Vậy ta có phương trình phản ứng

2Fe(OH)3+ 3H2SO4 -> Fe2(SO4)3 + 6H2O

1B

2C

45. The wai is the traditional form of _____________ in Thailand. (GREET)
46. They weren’t _____________ to live with their parents after the wedding. (OBLIGATION)
47. It is considered _____________ to address an elder with his or her given name. (POLITE)
48. Is that woman the _____________ of the party? (HOST)
49. The children in our family are always _____________ to their elders. (RESPECT)
50. Custom _____________ from tradition in some aspects such as scale and time. (DIFFERENT)