Đốt cháy hoàn toàn 0,1 mol hỗn hợp X gồm 2 ankađien là đồng đẳng liên tiếp nhau cần 12,992 lít O₂(đktc). Tính % mol của ankađien có phân tử khối nhỏ trong hỗn hợp X

Chọn đáp án đúng:

1. She will give the childten their dinner...........

A. before he comes home             B. when he had come

C. as soon as he is coming           D. until he comes

2. He'll have to behave better........

A. until he is going to                       B. until he has gone to school

C. when he goed to school              D. before he will be going to school

3. I'll do it..........

A. when I was finishing my first project        B. after I had finish my first project

C. until I finished my first project          D. as soon as I have finished my first project

4.He is going to stay in our flat while..........

A. we were in Scotland                     B. we will be in Scotland

C. we had been in Scotland              D. we are in Scotland

5. Will you recognize him.......?

A. the moment you see him            B. until you are seeing him

C. after you will see him                  D. as soon as you saw him

6......, I will complete every exercise in my textbook

A. When I master English                          B. The moment I have mastered English

C. As soon as I had mastered English      D. Before I have mastered English

7. We can't play loud music......

A. before everyone will go to bed               B. when everyone went to bed

C. as soon as everyone is going to bed     D. after everyone has gone to bed

8. I'll wait with you........

A. until the bus comes                            B. after the bus have come

C. as soon as the bus had come            D. before the bus comes

9. We always have an ice cream........

A. after we had gotten to the beach        B. until we are getting to the beach

C. as soon as we get to the beach          D. before we got to the beach

10. She is the most beautiful woman...in our company

A. to work       B. working       C. to be worked      D. worked

Chọn từ trái nghĩa:

1. I've told him that he's heading for trouble, but he doesn't listen-it's just (water off a duck's back)

A. having effect on someone                 B. having difficulty doing something

C. having ability to do something           D. having no influence on somebody

2. Even since the accident. She's been a little (on edge) when driving

A. confident     B. anxious     C. nervous    D. supportive

3. I've had to (tighten my belt) since I stopped working full-time

A. save money     B. lend money     C. spend less money     D. spend much money

Sửa lỗi sai:

1. It's (inexcusable) that (such) young children (were) left the house (lonely)

2. (Researchers) are looking at (how) a mother's health can (effect) the baby (in) the womb

3. (The) police have (insured) the public that the escaped prisoners will not (evade) recapture (for long)

Chọn đáp án đúng:

1. Lorries...over the bridge have to be careful of the wind

A. coming      B. are come       C. are coming      D. came

2. You should eat more,....

A. you'll make yourself ill                B. you making yourself ill

C. or you'll make yourself ill            D. if you'll make yourself ill

3....., I will show her around my city

A. when she will come here          B. she coming here

C. when she comes here              D. when she came here

4. I don't know......

A. when she will come back           B. when she comes back        

C. when she came back                 D. when she will have come back

5. My parents are really satisfied with.......

A. what I have done           B. what I had done

C. have done                     D. what have I done

6. I'll never comprehend.......

A. why she did what she did               B. what she did why she did

C. why did she do what she did          D. what she does why she did

7......was a shock to his wife

A. What he was dismissed         B. That he was dismissed

C. Why he was dismissed          D. How hư was dismissed

8......was the dirty underhand way they had deceived her

A. What really angered her         B. That really angered her

C. She was angry                        D. Her anger which

9. All the students...to organize a picnic were discouraged when they saw the dark clouds

A. are wished     B. wished        C. are wishing        D. wishing

10. Students....in their essays late will lose ten marks

A. are handed      B. handing      C. are handing      D. handed

Chọn đáp án đúng:

1. He startes to....blind in his sixties

A. go         B. make         C. get         D. catch

2. A compromise has to be...between all the powerful vested interests before any restoration work in the city can take place

A. reached        B. ruined        C. made        D. done

3. How long can you...your breath under water?

A. keep        B. hold        C. take       D. catch

4. Mrs.Theodore, do you mind if I ask you...questions about what you did the night before?

A. a little      B. a few      C. much      D. lot of

5. Even though I had....friends in my high school days, I was able to form close relationships with all of them

A. a few        B. few       C. plenty of        D. many

6. I'm going to wait.........

A. until the January sales start to buy a new jacket

B. when the January sales started to buy a new jacket

C. after the January sales have startes to buy a new jacket

D. as soon as until the January sales will start to buy a new jacket

7. This decision will not become effective.........

A. when it will be approved by the Ministry of Foreign Trade

B. until it is approved by the Ministry of Foreign Trade

C. after it had been approved by the Ministry of Foreign Trade

D. as soon as it was approved by the Ministry of Foreign Trade

8. We'll sit here.......

A. when Donna finished her homework

B. till Donna finished her homework

C. as soon as Donna finishes her homework

D. after Donna will finish her homework

Chọn đáp án đúng:

1. Paul will...mad when he finds out you've broken his watch

A. go      B. make         C. get         D. catch

2. We....preference to those who have worked with us for a long time

A. lend        B. give       C. deliver        D. send

3. Being a teaching assistant means that you have to come early to...up the classroom before it starts

A. go         B. set        C. make         D. do

4. Rhe teacher....the papers and asked us to write our expectation for this course

A. gave out       B. handed out       C. took out        D. grew out

5. Although milk seems like an innocent snack,...people can actually be allergic to it

A. little        B. much         C. some         D. few

6. He isn't considered popular among this classmates. That's probably the reason why he has so...friends

A. little         B. much         C. some        D. few

7. The weather has been awfully dry lately. We have had...rain

A. little        B. much         C. some        D. few

8. They always close their curtains........

A. once they got home in the evening

B. once they will get home in the evening

C. once they get home in the evening

D. once they had got home in the evening

9. She will pick you up.......

A. until she come here                            B. before she comes here

C. when she had come here                   D. as soon as she had come here

10. The man...you yesterday is a television reporter

A. to help       B. helped        C. helping       D. to be helped

11. My dad,...at my strange behaviors, asked me to give clear explanation

A. being surprised       B. surprised       C. to be surprised      D. to surprise

12. It is possible that my school basketball team will lose the game

A. My shcool basketball team should win the game

B. My shcool basketball team need not win the game

C. My shcool basketball team must win the game

D. My shcool basketball team may not win the game

13. I'm sure this isn't the type of house that Tom is looking for

A. This can't be the type of house that Tom is looking for

B. This must be the type of house that Tom is looking for

C. This shouldn't be the type of house that Tom is looking for

D. This could be the type of house that Tom is looking for

14. Cheating is not allowed in the GCSE

A. You may cheat in the GCSE

B. You musn't cheat in the GCSE

C. You don't have to cheat in GCSE

D. You should cheat in the GCSE

15. There's no way that boy is Simon because he's much taller!

A. That boy must be Simon because he's much taller!

B. That boy may not be Simon because he's much taller!

C. That boy could be Simon because he's much taller!

D. That boy can't be Simon because he's much taller!

Chọn đáp án đúng:

1. The jobs give you lots of chances to travel abroads; it's certainly a very...offer

A. attractive       B. attract         C. attractively         D. attraction

2. One...method for keeping our mind active is doing crossword puzzles

A. popularity       B. popular        C. popularize        D. popularly

3. The issue of climate change has received a lot of...recently

A. attentive         B. attention        C. attend         D. attentively

4. The...of electronic books has changed the way many peope read

A. invent        B. invention        C. inventively         D. inventive

5. When James was in Vietnam, he tried a...of Vietnamese dished

A. variety        B. variously         C. various       D. vary

6. Cultural...can be found in such simple processes as giving or receiving a gift

A. defferences       B. different       C. differently        D. differ

7. Listen to me carefully,....?

A. will you        B. won't he       C. will he        D. won't you

8. It took me a lot of time to concentrate....the questions

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

9. It was the unusual color of his jacket that..my eye

A. paid         B. caught        C. made        D. got

10. She phoned to say she couldn't...her appointment

A. bring         B. keep         C. give         D. do

Chọn đáp án đúng:

1. The girl was very pleased with the result of the exam,....?

A. didn't she      B. wasn't she      C. does she       D. is she

2. Peter was...last student to leave the classroom yesterday

A. an          B. a         C. the        D. 0

3. Different conservation efforts have been made in order to save giant panndas...they were under greater threat

A. because        B. although        C. despite        D. because of

4. My mother works in an orphanage...by an independent non-profit organization from England

A. is sponsoring       B. is sponsored       C. sponsored       D. sponsoring

5. Many countries in the world have complimented Vietnam on...effective measures in combating Covid 19

A. taking        B. causing       C. making       D. doing

6. I don't understand your point. Could you...it with an example?

A. intensify       B. verify       C. clarify       D. diversify

7. I'm afraid an adventure holiday is not really my cup of... I'd rather relax by the pool at a luxury hotel

A. coffee         B. beer         C. tea        D. wine

Sủa lỗi sai:

My (younger) brother is (determined) to erase the memory of a (disappointed) Cup debut two (years) ago

Hỗn hợp X gồm ankin Y và H₂ có tỉ lệ mol là 1:2. Dẫn 13,44 lít hỗn hợp X (đktc) qua Ni, nung nóng thu được hỗn hợp Z có tỉ khối so với H₂ là 11. Dẫn hỗn hợp Z qua dung dịch Br₂ dư, sau phản ứng hoàn toàn thấy có 32g Br₂ đã phản ứng. Tìm công thức ankin Y