1. Nam said that he.........was doing....... (do) his homework then.

2. Chung asked me..... .not to play.... ..(not play) in the class.

3. Huong told me...........to listen....(listen) to him carefully.

4.She used.....to walk.........(walk) to school when she........was..... (be) ten.

5. My mother.........did... (do) the housework two hours ago.

6. They will participate in.........playing...... (play) sports to keep fit.

7. Mai hates........watching.........(watch) TV but she likes. ........learning . .......(learn) English.

8. My mother is always busy.......working........(work).

9. Would you like........to meet........ (meet) my mother?

10. If you learn hard, you........will get..... (get) good grades.

2)

Theo đề bài ta có :

n_SO2 = 4,032 : 22,4 = 0,18 (mol)

n_Ca(OH)2 = 1,6 . 0,01 = 0,016 (mol)

Ta có T = \(\dfrac{n_{Ca\left(OH\right)2}}{n_{SO2}}=\dfrac{0,016}{0,18}=\dfrac{4}{45}< 1\)

=> ta có PTHH :
2SO2(0,18) + Ca(OH)2(0,016) -----> Ca(HSO3)2 (0,016)

Ta thấy : \(\dfrac{0,18}{2}>\dfrac{0,016}{1}\)

=> SO2 dư

=> n_Ca(HSO3)2 = 0,016 (mol)

=> m_Ca(HSO3)2 = 0,016 . (40 + 2 + 64 + 96) = 3,232 (g)

1)

Theo đề bài ta có :

n_SO2 = 22,4 : 22,4 = 1 (mol)

m_NaOH = 100 . 6,4% = 6,4 (g)

=> n_NaOH = 6,4 : (23 + 1 + 16) = 0,16 (mol)

Ta có tỉ lệ mol : T = \(\dfrac{n_{NaOH}}{n_{SO2}}=\dfrac{0,16}{1}=0,16< 1\)

=> PTHH :

SO2(1) + NaOH(0,16) ----> NaHSO3(0,16)

Ta thấy : SO2 dư 1 - 0,16 = 0,84 (mol)

=> n_NaHSO3 = n_NaOH = 0,16 (mol)

=> m_NaHSO3 = 0,16 . (23 + 1 + 32 + 48) = 16,64 (g)

PTHH :

SO2 + H2O -----> H2SO3

m_H2O = m_{dd NaOH} - m_NaOH = 100 - 6,4 = 93,6 (g)

=> n_H2O = 93,6 : 18 = 5,2 (mol)

Ta thấy : n_{SO2 (PỨ)} = 0,84 (mol)

=> H2O dư

=> n_H2SO3 = 0,84 (mol)

=> m_H2SO3 = 0,84 . (2 + 32 + 48) = 68,88 (g)

Như vậy dung dịch sau phản ứng gồm 2 chất là H2SO3 và NaHSO3

m_{dd (sau PỨ)} = m_SO2 + m_{dd NaOH} = 64 + 100 = 164 (g)

=> C% H2SO3 = 68,88 . 100% : 164 = 42%

=> C% NaHSO3 = 16,64 . 100% : 164 = 10,15%

PTHH :

2Al(0,075) + 3H2SO4(0,15) -----> Al2(SO4)3(0,0375) + 3H2(0,1125)

Theo đề bài ta có :

n_Al = 2,025 : 27 = 0,075(mol)

n_H2SO4 = 14,7 : 98 = 0,15 (mol)

Ta có tỉ lệ mol : \(\dfrac{0,075}{2}< \dfrac{0,15}{3}\)

=> H2SO4 dư

=> n_H2 = 0,075 . 3 : 2 = 0,1125 (mol)

=> V_{H2 (đktc)} = 0,1125 . 22,4 = 2,52 (lít)

I. Dùng dạng so sánh phù hợp của từ cho trong ngoặc :

1. This chair is .............more comfortable............ than that one ( comfortable ) .

2. Your flat is ..............larger............ than mine ( large ).

3. Love is ..............more important................. than money ( important ).

4. English is ...........more difficult................ than literature ( difficult ).

5. Her English is ....better................... than her husband's ( good ).

6. My father's cooking is ..........worse than....... my mother's ( bad ).

7. This dress is ...........prettier................... than that one ( pretty ).

8. Your flat is ...........farther..................... from school than mine ( far ).

9. Today is ...............happier.................. than yesterday ( happy ) .

10. He is ................more clever.................... than his father ( clever ).

11. My car is .............slower............. than his ( slow ).

21. I haven’t been to a Chinese restaurant for ages. 

It’s age since i last went to a Chinese restaurant .

22. The last time Nancy came here was in 1986. 

Nancy hasn’t come here since 1986

23. It’s a long time since our last conversation. 

We haven't talked for a long time

24. “I think you should go by train.” He told us. 

He advised us to go by train

25. Julia cleaned the house. Then she went shopping. 

After cleaning the house, Julia went shopping.

26. Jim was travelling in Paris. He met his old friends there. 

While Jim was travelling in Paris, he met his old friends there

27. First Jane checked all the prices. Then she bought a new car. 

Jane bought a new car after checking all the prices

28. Jack went to Vietnam in 2002. He returned home in 2005. 

Jack stayed in Vietnam from 2002 to 2005

29. They finished work and then left the office. 

They left the office fater finishing work

30. We started learning English about 5 years ago. 

We’ve learned english for 5 years

1. This room / nice / the room in hotel.

- This room is nicer than the room in hotel.

- This room is as nice as the room in hotel.

2. His car / run / fast / my car.

-His car runs faster than my car.

-His car runs as fast as my car .

3. Films / intersting / plays.

-Films are more intersting than plays.

--Films are as intersting as plays.

4. Jack / intelligent / his girl friend.

-Jack is more intelligent than his girl friend.

--Jack is as intelligent as his girl friend.

5. Ha Noi / hot / Da Lat .

-Ha Noi is hotter than Da Lat .

-Ha Noi is as hot as Da Lat .

6. Hoa / young / her boy friend .

-Hoa is younger than her boy friend .

-Hoa is as young as her boy friend .

7. This road / narrow / that one.

-This road is narrower than that one.

-This road is as narrow as that one.

8. She / tall / her sister .

-She is taller than her sister .

-She is as tall as her sister .

9. Money / important / friendship.

-Money is more important than friendship.

-Money is as importantas friendship.

10. He works / good / his brother.

-He works better than his brother does .

-He works as well has his brother does .

Đề bài : change these sentences into indirect speech

1 'where are you going now?' Lan said to Nam .

Lan asked Nam where he was going then .

2 'Mr Nam will teach us tomorrow' The students said .

The students said Mr Nam would teach them the next day .

3 ' Lan's mother was ill, so the didn't go to class this morring' A girl said

A girl said Lan's mother had been ill, so she hadn't gone to class that morring .

4 ' Don't move,or I'll shoot ! ' the robber said .

the robber told me not to move or he would shoot .

5 'If I were you, I wouldn't tell that' My friend said to me .

My friend advised me not to tell that .

6 'You shouldn't stay up too late' I said to my son .

I said my son shouldn't stay up too late .

7'I will neet you tomorrow morning' I said to my grardma .

I told my grardma I would meet her the following morning .

8 'Lan you open the windowsi please?' The man said to me .

The man asked me to open the window .

9'Did you watch TV last night?' My friend said .

My friend asked me if i had watched TV the previous night .

10' When I seen her, I will tell you' Nam said to me .

Nam told me When he saw her, he would tell me .

11'When are you,John?' peter said .

peter asked John where he was .

12' Don't be late for shool,lienl' Lien's mother said .

Lien's mother told her not to be late for shool .

13' How do you go to work every day' He said to me .

He asked me How i went to work every day .

14'will you help me move this chair away?' The girl said to the man .

The girl asked the man to help her move that chair away .

a, I want to buy .......AN.... envelope and .....A............. fifty thousand dong phone card

b, Go along that road and take .....THE......... first turning on ..THE....... left

c, He needs to buy .A...... stamp for .......X...... overseas mail

d, Mount Everest is ......THE..... highest one in ...THE..... the world

e, I have got .....A....... little money left, let's have dinner in ....X... the restaurant

PREPPOSITION + COMPARISON

6. Write the correct from of the adjectives in parenthese:

1. New York is (large).....................THE LARGEST...................city of the United States.

2. She is (happy)...............HAPPIER...........................than I am.

3. Show me (good)................THE BEST...........................restaurant downtown.

4. This bike is (cheap)..................CHEAPER........................than mine.

5. Nestor Studious is (old)...................THE OLDEST...............................movie company in Hollywood.

6. A dog is (heavy)..............HEAVIER...............................than a cat.

7. Ho Chi Minh City is (large).............LARGER......................................than Ha Noi.

8. Who is (rich).............THE RICHEST...........................woman on the world?

9. He was (clever)................THE CLEVEREST............................thief of all.

10. (hot)......................THE HOTTEST..........................desert of all is the Sahara and is's in Africa.