có 1 hỗn hợp gồm al và fe3o4 .đem nung trong môi trường không có không khí. chất rắn thu được phản ứng với dung dịch naoh thu được 6,72l khí . lấy cùng lượng chất rắn đó cho phản ứng với dung dịch hcl thu được 26,88l khí. xác định kim loại hỗn hợp ban đầu.xác định khối lượng fe3o4 và khối lượng al đã phản ứng . giúp em với ạ
người ta pha 1 lượng nước ở 80 đọ C vào bình chứa 9 lít nước đang có nhiệt độ 22 độ C .Nhiệt độ cuối cùng khi có cân bằng nhiệt là 36 độ C.tính lượng ước đã pha thêm vào bình .Bỏ qua nhiệt lượng truyền cho bình và môi trường bên ngoài , biết nhiệt dung riêng của nước là 4200J/kg.K
I- REPORTED STATEMENTS:
1. “ I’ll see you tomorrow’’ She said......
2. “ I saw her today’’ She said......
3. “I don’t like this film’’ She said......
4. “ We went swimming today’’ She said......
5. “ I’ll meet Mary on Sunday’’ She said.......
6. “ Peter and Sue are getting married tomorrow’’ He said.....
7. “I really like this furniture’’ She said......
8. “ I’m meeting them at four o’clock today’’ He said....
9. “ I live here with my parents’’ He said.....
10. “ Our new house is beautiful’’ He said....
11. “ I want to be a teacher of English’’ He said....
12. “ I can’t speak chinese’’ She said......
13. “ My sister is now having a wonderful time in Nha Trang’’ He said....
14. “ I’ll be very busy today’’ She said......
15. “ I must come to the meeting tomorrow’’ He said....
16.“ These roses are for you’’She told me......
17. “ I’m going away tomorrow , mother’’ He said....
18. “ Nothing can grow in my garden. It never gets sun He said....
19. “ It is so foggy today’’ She said......
20. “ If you answer the questions correctly, you may win us 100 She said......
21. “ I have to clean the floor today’She said......
22.“ These roses are cut from my garden’My aunt said.....
II- REPORTED YES – NO QUESTIONS.
“Do you want to buy any second – hand books?’’ Bill asked me………. “Do you play any musical instruments?’’=> Lan asked me………….. “Will you have time to play regularly? ’’=> Bill asked me…………. “Do you play for your school team?’’ => Lan asked me………….. “Can you speak any other languages?’’ He asked me...... “Are you interested in learning English?’’ => Lan asked me………….. “Is there a phone?’’ => Lan asked me………….. “Do you have many friends?’’ He asked me...... “Do you often get home after 10 .30 p.m?’’ => Lan asked me…………..10.“Can you speak English?’’ => Lan asked me…………..
11.“Are you working as well as studying?’’ He asked me......
12.“Are you interested in acting?’’ => Lan asked me…………..
13.“Is there a college orchestra?’’ He asked me......
14.“Have you seen my car keys?’’ => Lan asked me…………..
15.“Will you come here next week?’’ He asked me......
16.“Are you hungry?’’ => Lan asked me…………..
17.“Does your brother live in London?’’ => Lan asked me…………..
18.“Do you know who broke the window?’’ He asked me......
19.“Have you heard yourself?’’ => Lan asked me…………..
20.“Have you finished your exam?’’ He asked me......
21.“Do you live near your family?’’ => Lan asked me…………..
III- WH-QUESTIONS:
“Why do you have to do this work?’’ He asked me...... “What are you doing?” => He asked Lan…… “What will you do when you leave school?” => Lan asked me………….. “How did you know my name?” => He asked Lan……. “Why didn’t you phone me?” => He asked Lan……. “When can I see the doctor?” => Lan asked me………….. “Where are you going?” => He asked Lan……. “Where are you going to spend the holiday?” => Lan asked me………….. “How big are the classes?” => He asked Lan…….10. “What sorts of food do they serve?” => Lan asked me…………..
11. “How long are you staying here?” => Lan asked me…………..
12. “What are you going to study ?” => He asked Lan…….
13. “What kind of sports do you like best?” => He asked Lan…….
14. “What do you think of the canteen coffee?” => Lan asked me…………..
15. “What’s the name of the college?” => He asked Lan…….
16. “How many students are there in the college?” => He asked Lan…….
17. “Who is the headmaster?” => Lan asked me…………..
18. “What country do you come from?” => He asked Lan…….
19. “How long do you stay here?” => Lan asked me…………..
20. “How will you use English in the future?” => He asked Lan…….
21. “How far is it to the school?” => Lan asked me…………..
22. “How do you go to school?” => He asked Lan…….
23. “Why are you so late?” => He asked Lan…….
24. “How did you get to school?” => Lan asked me…………..
25. “Why won’t they let me in?” => He asked Lan…….
26. “Who do you want to talk to?” => He asked Lan…….
I/ Complete these sentences:
1.
1. I wish I (can) speak English perfectly.à I wish……….....…………..………….....….……………………………
2. I wish I (can) do this exercise. à I wish……….....…………..………….....….…………………………
3. I wish I (know) how to swim. à I wish……….....………….….....………..………………………………
4. I wish the weather (be) better today. à I wish……….....…………..………….....….………………………………
5. I wish you (like) my painting. à I wish……….....…………..………….....….…………………………
6. I wish I (not have to) work on Saturday. à I wish……….....…………..………….....….……………………………
7. I wish you (not come) here late. à I wish……….....…………..………….....….…………………………
8. I wish I (will be) there soon. à I wish……….....…………..………….....….………………………
9. I don’t know anyone in this class. à I wish……….....…………..………….....................….…………………
10. The dictionary is very expensive. à I wish……….....…………..………….....................….……………
11. It’s a pity that my room is too small! à I wish……….....…………..………….....................….……………………………
12. She isn’t here. à She wishes ……….....…………..………….....................….………
13. The students never go abroad. à The students wish ……….....…………..………….....................….………
14. They cannot eat seafood. à They wish……….....…………..………….....................….……………
15. Their team don’t play very well. à They wish……….....…………..………….....................….……………………
16. Lien never goes on a camping trip. à Lien wishes……….....…………..………….....................……………………..
17. I don’t know anyone in this class. à I wish……….....…………..………….....................….………………………………
18. It’s very cold in the winter here. à I wish……….....…………..………….....................….………………………………
19. I don’t know anyone in this class. à I wish……….....…………..………….....................….……………………
20. The dictionary is very expensive. à I wish……….....…………..………….....................….…………………
21. I often went fishing there. à I used to ....…………..………….....................….……………………………
22. My father doesn’t smoke any more. à My father used to………….....................….……………………………
23. He often watched TV at night. à He used to……….....…………..………….....................….……………………
&&
2-Choose the best options to complete the sentences below
1. They are pen pals. They (are writing/ write/ has written/ wrote) each other twice a month.
2. I was very (impressed/ corresponded/ comprised/ interested) by the efficiency of the staff.
3. We must learn English at school. It is a/an (primary/ compulsory/ national/ optional) subject.
4. I wish you (were / are / would be/ will be) here with us now.
3-Choose the best word/words in brackets
1. My friend.........................to the museum last weekend. (goes, went, had gone)
2. My grandfather.............................many years ago. (dies, died, has died, was dying)
3. I.......................my son the money for that last week. (gave, given, have given, was given)
4. The earth.........................around the sun. (go, went, has gone, goes)
5. He ...............................her walk through the park two hours ago. (sees, saw / has seen)
4-Supply the correct tense form of the verbs in brackets
1. She usually....................................dinner for the family. (cook)
2. They................................their mother with the housework everyday. (help)
3. Mr. Brown.........................................in Birmingham ten years ago. (live)
4. There.................................a traffic jam in the center of the city almost last year. (be)
5. The students........................................the final test everymonth. (have)
6. They.........................................those interesting books yeterday. (read)
7. Lan...........................some flowers for her teacher last Sunday. (buy)
8. The Pikes....................................dinner last night. (have)
9. he ................................................. this book for children last year. (write)
10. She......................................Bangkok two years ago. (visit)
5-Choose the best options to complete the sentences below:
1. Are you (enjoying– waiting– looking– pleasing) your staying in Vietnam?
2. She wishes (can– can’t – could – couldn’t) swim well.
3. Vietnamese people are (friend – friends – friendship – friendly).
4. We’ve (corresponded–separated–impressed–prayed) for ten years, but we have never met him.
6-Choose the best word/words in brackets
My friend .....................to the museum now. (goes, went, is going) My grandfather ..........................TV at the moment. (watches/ is watching/ was watching) Tom was taking a photograph of me while I ................ (don’t look/ isn’t looking/ wasn’t looking). I .......................... soccer at that time. (am playing/ was playing/play) Look! It’s ......................... (is snowing/ was snowing / snows).7-Give the correct form of the verbs in the blankets:
He ................... (paint) the ceiling at the moment. Last night I ................... read in bed when suddenly I heard a scream. ............... ....................... (You/watch) television when I phoned you? Ann ................... (wait) for me when I arrived. I ................... (not/drive) very fast when the accident happened. What ................... (you/do) at this time yesterday? I saw Carol at the party. She ................... (wear) a really beautiful dress. When the teacher came in, the pupils ............. ................... (play) games. Excuse me, I ......................... (look) for a phone book.Is there one near here?Listen! Can you hear those people next door? They ......................... (shout) at each other again
8-Give the correct form of the verbs in the blankets:
1. My brother (join) …………………………………………the army when he (be) …………………………………………young.
2. Tom (study) …………………………………………chemistry for three years and then he gave it up.
3. Miss Lee often (write) …………………………………………when she was on holiday.
4. He (leave) …………………………………………home two weeks ago.
5. When the teacher came in, the pupils (play) …………………………………………games.
6. Columbus (discover) …………………………………………America more than 400 years ago.
7. I last (see) …………………………………………him since last Sunday.
8. She (play) …………………………………………the piano when our guest (arrive) …………………………………………last night.
9. The light (go) …………………………………………out when we (have) …………………………………………dinner.
10. What …………………………………………you (do) …………………………………………at 7 PM last night?
9-Supply the correct tense form of the verbs in brackets
1. The children..............................................basketball now. (play)
2. She usually....................................dinner for the family. (cook)
3. The boys...................................a play for their school show on T.V at the moment. (rehearse)
4. They................................their mother with the housework every day. (help)
5. There.....................a traffic jam in the center of the city almost every day since last year. (be)
6. Lan...........................some flowers for her teacher last Sunday. (buy)
7. The Pikes....................................dinner at 7 o’clock last night. (have)
8. She......................................Bangkok two years ago. (visit)
9. The dancers.........................................very well when we came. (perform)
giúp mình với ,mình cảm ơn
Read the following passage carefully and fill in the blanks with suitable prepositons.
THE OPENING CEREMONY OF SEA GAMES
The eighteenth Sea Games took place (1)................ Changmai - Thailand in the winter (2)....................1995. Competitors (3) ............. ten countries of this area - all must be amateur athletes were sent there to take part (4)........... sport events (5)........... different kinds.
In the opening ceremony, all athletes lined up (6)............the field. Each delegation stood (7)............ its national flag. (8)...........that, the athletes began to march proudly in front (9)...........the stand to express their friendship and sportmanship. People carried a torch to the high tower and its flame would burn there (10)..............the games.
GIÚP MÌNH VỚI, MÌNH CẢM ƠN :)))
Exercise 2:Change the following sentences into the passive voice
1. They built this church in 1973.
……………………………………………………………………………………………………………
2. Do they teach English in your school?.
……………………………………………………………………………………………………………
3. Nobody believes his story..
……………………………………………………………………………………………………………
4. Someone is following her.
……………………………………………………………………………………………………………
5. They asked me many difficult questions.
……………………………………………………………………………………………………………
6. They are repairing my piano.
……………………………………………………………………………………………………………
7. They are building a house, aren’t they ?.
……………………………………………………………………………………………………………
8. Students are doing a lot of homework.
……………………………………………………………………………………………………………
9. Can Mary tear the letter ?
………………………………………………………………………………………………………….
10. Do you understand this lesson?
……………………………………………………………………………………………………………
11. She looked after our children when we were out.
……………………………………………………………………………………………………………
12. Nobody has used this room for ages.
……………………………………………………………………………………………………………
13. The boy hit the dog in the garden yesterday.
……………………………………………………………………………………………………………
14. Who wrote this book?
……………………………………………………………………………………………………………
15. Who has cleaned this room?
……………………………………………………………………………………………………………
16. The fire has caused considerable damage.
……………………………………………………………………………………………………………
17. The committee is considering several new proposals.
……………………………………………………………………………………………………………
18. No one may open this letter, may they ?
……………………………………………………………………………………………………………
19. They bought her a present on her birthday.
……………………………………………………………………………………………………………
20. Someone has told him to report for duty at 6.00pm
……………………………………………………………………………………………………………
21. The author has written a special edition for children.
……………………………………………………………………………………………………………
22. They make these artificial flowers.
……………………………………………………………………………………………………………
23. Does John return the book he borrowed yesterday ?
……………………………………………………………………………………………………………
24. They are pulling down the old theatre.
……………………………………………………………………………………………………………
25. we use this room onlyon special occasions.
……………………………………………………………………………………………………………
26. Have they told you anything about it?
……………………………………………………………………………………………………………
27. What language do they speak in Japan?
……………………………………………………………………………………………………………
28. Someone has taken her bag by mistake.
……………………………………………………………………………………………………………
29. They haven’t done anything about it.
……………………………………………………………………………………………………………
30. It is time some one told him what is wrong.
…………………………………………………………………………………………………………….
31. Ann gave the boy a ticket and led him to the theatre.
…………………………………………………………………………………………………………….
32. Someone broke into his house and stole a lot of things.
...............................................................................................
MN GIÚP EM VỚI Ạ
Exercise 2:Change the following sentences into the passive voice
1. They built this church in 1973.
……………………………………………………………………………………………………………
2. Do they teach English in your school?.
……………………………………………………………………………………………………………
3. Nobody believes his story..
……………………………………………………………………………………………………………
4. Someone is following her.
……………………………………………………………………………………………………………
5. They asked me many difficult questions.
……………………………………………………………………………………………………………
6. They are repairing my piano.
……………………………………………………………………………………………………………
7. They are building a house, aren’t they ?.
……………………………………………………………………………………………………………
8. Students are doing a lot of homework.
……………………………………………………………………………………………………………
9. Can Mary tear the letter ?
………………………………………………………………………………………………………….
10. Do you understand this lesson?
……………………………………………………………………………………………………………
11. She looked after our children when we were out.
……………………………………………………………………………………………………………
12. Nobody has used this room for ages.
……………………………………………………………………………………………………………
13. The boy hit the dog in the garden yesterday.
……………………………………………………………………………………………………………
14. Who wrote this book?
……………………………………………………………………………………………………………
15. Who has cleaned this room?
……………………………………………………………………………………………………………
16. The fire has caused considerable damage.
……………………………………………………………………………………………………………
17. The committee is considering several new proposals.
……………………………………………………………………………………………………………
18. No one may open this letter, may they ?
……………………………………………………………………………………………………………
19. They bought her a present on her birthday.
……………………………………………………………………………………………………………
20. Someone has told him to report for duty at 6.00pm
……………………………………………………………………………………………………………
21. The author has written a special edition for children.
……………………………………………………………………………………………………………
22. They make these artificial flowers.
……………………………………………………………………………………………………………
23. Does John return the book he borrowed yesterday ?
……………………………………………………………………………………………………………
24. They are pulling down the old theatre.
……………………………………………………………………………………………………………
25. we use this room onlyon special occasions.
……………………………………………………………………………………………………………
26. Have they told you anything about it?
……………………………………………………………………………………………………………
27. What language do they speak in Japan?
……………………………………………………………………………………………………………
28. Someone has taken her bag by mistake.
……………………………………………………………………………………………………………
29. They haven’t done anything about it.
……………………………………………………………………………………………………………
30. It is time some one told him what is wrong.
…………………………………………………………………………………………………………….
31. Ann gave the boy a ticket and led him to the theatre.
…………………………………………………………………………………………………………….
32. Someone broke into his house and stole a lot of things.
...............................................................................................