Câu 31. Đốt cháy hoàn toàn hỗn hợp X gồm metan và axetilen thu được 8,96 lít khí cacbonđioxit (đktc). Mặt khác khi dẫn hỗn hợp X qua bình đựng dung dịch brom dư, phản ứng xong thấy khối lượng bình đựng dung dịch brom tăng 2,6 gam.
a) Tính tỉ lệ phần trăm về thể tích các khí trong hỗn hợp X?
b) Tính thể tích không khí cần dùng để đốt cháy hỗn hợp trên?
Bài tập 1
Điền câu hỏi đuôi thích hợp và các câu sau
She’s from a small town in China, …. ?
He’s still sleeping, …. ?
We’re late again, …. ?
I’m the person with the tickets, …. ? I AM-> AMNOT I-> AREN’T I
You do go to school, …. ?
The weather is really bad today, …. ?
Let’s go for a walk, …. ?
They aren’t in Mumbai at the moment, …. ?
We won’t be late, …. ?
John’s a very good student, …. ?
Bài tập 2
Tìm và sửa lỗi sai trong các câu dưới đây
Minh isn’t listening to music, isn’t he?
He couldn’t do her a favour, couldn’t he?
I’m late to this meeting, am not I?
Let’s go out for a walk, will we?
Turn off the fans before going out, will you?
Don’t forget to repair this car, won’t you?
That is his cat, is it?
Na should pass her test tomorrow, should she?
Read my book, will you?
After it gets dark, they should leave soon, should they?
Bài tập 1
Điền câu hỏi đuôi thích hợp và các câu sau
She’s from a small town in China, …. ?
He’s still sleeping, …. ?
We’re late again, …. ?
I’m the person with the tickets, …. ? I AM-> AMNOT I-> AREN’T I
You do go to school, …. ?
The weather is really bad today, …. ?
Let’s go for a walk, …. ?
They aren’t in Mumbai at the moment, …. ?
We won’t be late, …. ?
John’s a very good student, …. ?
Bài tập 2
Tìm và sửa lỗi sai trong các câu dưới đây
Minh isn’t listening to music, isn’t he?
He couldn’t do her a favour, couldn’t he?
I’m late to this meeting, am not I?
Let’s go out for a walk, will we?
Turn off the fans before going out, will you?
Don’t forget to repair this car, won’t you?
That is his cat, is it?
Na should pass her test tomorrow, should she?
Read my book, will you?
After it gets dark, they should leave soon, should they?
Bài tập 3
Điền câu hỏi đuôi thích hợp vào chỗ trống
Nobody called, …. ?
She doesn’t work in a hotel, …. ?
They will wash the car, …. ?
We live in a tiny flat, …. ?
We must lock the doors, …. ?
David and Julie don’t take Chinese classes, …. ?
I often come home late, …. ?
I’m right, …. ?
She doesn’t cook very often, …. ?
So you bought a car, …. ?
21. The Cotswold is an area of great ________.
A. beauty B. beautifully C. beauties D. Beautiful
22. Nowadays Viet Nam is a ________ country.
A. developed B. develop C. developing D. Development
23. The government is very concerned about the ________ of the acid rain.
A. destroying B. destructive C. destroy D. destruction
24. The surgeons tried their best to save his life, but unfortunately the operation was_________.
A. succeeded B. successful C. unsuccessful D. success
25. People crowded the streets on ______ Day to watch colorful parades.
A. Nation B. National C. Nationally D. Nationality
26. The equipment in our office needs ________.
A. modern B. modernizing C. modernized D. modernization
27. He is one of the best ________ in the world.
A. science B. scientist C. scientists D. scientific
28. Foreigners who learn English normally have difficulty with its ________.
A. pronounce B. pronunciation C. pronounced D. pronouncing
29. I am ________ that you passed your English exam.
A. please B. pleasure C. pleasant D. pleased
30. Angkor Watt now is a famous tourist ________.
A. attract B. attractive C. attraction D. attractively
I. Put the correct form of the words in BOLD to complete the sentences.
1. This library is open to all ________________. READ
2. Environmental ________________ is everybody’s responsibility. PROTECT
3. ______________ waves are one of the great forces of nature. They are very dangerous for people. TIDE
4. This is the ______________storm we have had for years. BAD
5. This book is very _____________ to me, so I like it very much. USE
6. They had an ______________ day by the river. ENJOY
7. Vietnamese people are very _______________. FRIEND
8.It is still a bit________________ to use the Internet in everyday life. COST
9. The ______________ warned the fishermen about the typhoon carefully. SCIENCE
10. ______________, we decided to have our picnic near a nice beach. FINAL
11. I will make ______________ for you to meet him at the airport. ARRANGE
12. What led to the _____________ of the telephone? INVENT
13. This school has _______________ -qualified teachers. GOOD
14. We need further _______________. INFORM
15. The ______________ of the model attracts us. EFFICIENT