1) Hãy tìm CTHH của khí A. Biết rằng :
- Khí A nặng hơn khí Nitơ 1,571 lần
- Thành phần phần trăm theo khối lượng của các nguyên tố là: %C= 27,273 % ; O % = 72,727%
2) Tìm thành phần phần trăm ( theo khối lượng) các nguyên tố hóa học có trong hợp chất Fe2O3
( Cho biết nguyên tử khối các nguyên tố như sau: K =39; Ca = 40 ; Na = 23 ;
Fe = 56; H =1; C = 12; O=16 ; N=14 )
EXERCISE:
Exercise 1: Fill in the blank with suitable article ‘A’, ‘An’ hoặc (X)
1. She asked me for ___ information about the meeting.
2. They will move to ___ mansion next month.
3. I’d like ___ grapefruit and ___ orange juice.
4. ___award was given to Jim yesterday.
5. We read ___ books and play ___ games when we have free time.
6. Jim doesn’t want to borrow ___ money from anyone.
7. My friend and I threw ___ party last week.
8. It was ___ honor to be invited here today.
9. I’ve bought ___ umbrella for my sister.
10. My family often have____ eggs for breakfast.
11. Would you like______cup of tea?
12. My brother doesn’t like ______ cats.
13. Is there __________post office here?
14. I spend _________hours on my DIY project.
15. Mr. Peter used to be ___________famous vet.
Exercise 2: Điền mạo từ “a”, “an” hoặc “the” vào chỗ trống sao cho phù hợp.
1. We have __ cat and ____ dog, _____ cat doesn’t get on well with ___ dog.
2. You can see ____ moon clearly in the Mid-Autumn festival.
3. He is ____famous actor.
4. My brother doesn’t like ____ present I gave him.
5. Where is ____ book I lent you last week?
6. My father works as ___ electrician.
7. Have you ever heard about ____ River Thames?
8. I want to travel around _____ world when I grow up.
9. Yesterday my mother had ______terrible headache.
10. Peter is ______most hard-working student I’ve ever known.
EXERCISE:
Exersice 1: Choose the correct answer:
1. Living in this small town is (moree peaceful/ peaceful more) than I expected.
2. Nowadays people are (more anxious/ anxious more) about pollution than before.
3. Today you look ( happier/ more happy) than usual.
4. This year I will move to a (bigger/ biggest) city.
5. This experience is (more exciting/ most exciting) than I expected.
6. Who is (more intelligent/ most intelligent) between two of them.
7. This song is (catcher/ more catchy) than that song.
8. The new sofa is (costlier/ more costly) than the old one
9. Our family will move to a (more comfortable/ more comfortable than) place next year.
10. I hope you will get (best/ better) the next time I see you.
11. James has (many/ more) books than Paul.
12. She is (more independent/ most independent) than the last time I saw her.
13. Today my sister (is more quiet/ quieter) than usual.
14.Jane is(more pretty/ prettier) than Ann.
15.The weather is (hotter/ hottest) than yesterday.
Exersice 2: Complete the sentences, using the comparative form of the adjectives in the brackets.
1. Living in the city is________than living in the country (convenient).
2. Mrs.Smith is_________than I thought. (young)
3. Houses in big cities are much_________than those in my hometown. (tall)
4. No one in my class is_________than Jim. (smart)
5. The senior prom would be_________than any other proms (exciting)
6. I have__________courage than my brother(little)
7. His health condition is getting__________(bad)
8. You are_________than you think. (clever)
9. This computer is much_________than mine. (expensive)
10. I always dream of a__________house to live in. (modern)
11. They are__________than they used to be . (skillful)
12. Life in this village is_________than anywhere else. (peaceful)
13. I think people in the countryside are________than city dwellers (friendly)
14. This year, the prize for the winner is______than last year. (valuable)
15. Which dress is__________for me? (suitable)
16. You should be__________and show your best. (confident).
17. They said that the conference was________than usual. (interesting)
18. Jane is so pretty but her sister is even__________(pretty).
19. They work hard to have________life. (good)
20. John is__________than the rest of the class. (intelligent)
EXERCISE:
Exersice 1: Complete the sentences with the verb in the box.
1. Did you enjoy (watch) ______the comedy last night?
2. Many people prefer (do) ______gardening after their retirement.
3. My cat dislikes (sleep) ________on the floor.
4. My father doesn’t mind (work ) ______hard.
5. My cousin doesn’t like (study) _________Math and Chemistry.
6. They dislike (talk) __________with each other.
7. Jim and Jane don’t fancy (go) __________out tomorrow.
8. Did you hate (eat) ______vegetables when you was small?
9. She didn’t prefer (tell) ________him about her plan.
10. James enjoys (have) _______dinner in a luxury restaurant.
11. I hope my mother will enjoy (spend) _______time with her grandchildren.
12. Some people enjoy (take) ______a shower in the morning.
13. I think your brother won’t mind (lend) ________you a helping hand.
14. My boyfriend dislike (wait) ____________.
15. What do you detest (do) __________the most?