Exercise1: Find the word which has a different sound in the underlined part

1. A.hear B.fear C.dear D.wear

2. A.near B.appear C.bear D.idea

3. A.fear B.smear C.bear D.weary

4. A.area B.year C.parents D.prepare

4. A.swear B.period C.here D.pierce

Exercise2: Make question for the words

1. My father was in Hà Nội last month.

→ Where was your father last month?

2. He travelled Nha Trang by coach.

→How did he travel to Nha Trang?

3. She went to the doctor because she was sick.

→Why did she go to the doctor?

4. Nam left home at 7 o'clock yesterday.

→What time did Nam left home yesterday?

5.Her mother gave her a blue dress.

→What did her mother give her?

6. I went to Nha Trang last summer vacation.

→When did you go to Nha Trang?

7. Mrs Robinson put the poster on the wall.

→Where did Mrs Robinson put the psoter?

8. They returned to America two weeks ago.

→When did they return to America?

Bài 1:

n_Al = \(\frac{m_{Al}}{M_{Al}}=\frac{2,7}{27}=0,1\left(mol\right)\)

PTHH: 4Al + 3O₂ --> 2Al₂O₃ (1)

4mol 3mol 2mol

0,1mol 0,075mol 0,05mol

n_O2 = \(\frac{V_{O2}}{22,4}=\frac{3,36}{22,4}=1,5\left(mol\right)\)

n_{O2(phản ứng 2)} = n_{O2(đề bài)} - n_{O2(phản ứng 1)}

= 1,5 - 0,075 = 0,075 (mol)

PTHH: 2Mg + O₂ --> 2MgO

2mol 1mol 2mol

0,15mol 0,075mol 0,15mol

m_Mg = n_Mg . M_Mg = 0,15 . 24 = 3,6 (g)

m_{hỗn hợp} = m_Al + m_Mg = 2,7 + 3,6 = 6,3 (g)

\(\%m_{Al}=\frac{m_{Al}}{m_{hh}}.100\%=\frac{2,7}{6,3}.100\%\approx42,86\%\)

\(\%m_{Mg}=\frac{m_{Mg}}{m_{hh}}.100\%=\frac{3,6}{6,3}.100\%\approx57,14\%\)

II. Choose the word whose main stress pattern is not the same as that of the others.
6. a. liquefy b. appliance c. helicopter d. document
7. a. mixture b. wonder c. perform d. heritage
8. a. guarantee b. properly c. chocolate d. printer
9. a.computer b. ingredient c. available d. bulletin
10.a. invent b. decorate c. participate d. design
III. Choose the word or phrase that best complete each of the sentence.
1. She has worked as a secretary ……… she graduated from college.
a. since b. until c. before d. while
2. We are very fond …… the game 20 questions.
a. in b. at c. with d. of
3. Could you turn the music ………. a little. It’s too loud!
a. on b. off c. down d. up
4. Glass is usually …….. sand.
a. made from b. made of c. made by d. made with
5. The Pyramid of Cheops in Egypt is one of seven …………… of the world.
a. landmarks b. historic places c. famous sights d. wonders
6. She asked the guide ……………. Phong Nha Cave was the most beautiful cave in Vietnam.
a. where d. which c. whether d. what
7. The statue was ……… out of stone.
a. cut b. designed c. carved d. sliced
8. They worked hard …….. they could pass the final examination.
a. since b. because c. although d. so that
9. The winner of the contest was given a(n) ……… for her excellent performance.
a. bonus b. reward c. fine d. award
10. …………. Was the fountain pen invented? Lewis Waterman.
a. Who b. By who c. Whom d. By whom
IV. Choose the correct form of the word to complete the sentence.
Radio, telegraph, television and other invention brought ……. for newspaper.
a. compete b. competence c. competition d. competitor
It’s one of the most ………….. trips I’ve ever had.
a. enjoying b. enjoyable c. recently d. recense
He has ……….. bought a new house.
a. recent d. recency c. recently d. recense
Faraday is one of the greatest ………. in history.
a. invents b. inventions c. inventive d. inventors
Scientific progress supplies us with ………………
a. convenient b. conveniences c. inconvenient d. inconveniences
V. Match the questions in column A to the suitable answers in column B.
Choose the word or phrase that best completes the sentences.
1. I am looking forward …………. from you.
a. to hear b. hearing c. to hearing d. to be heard
2. The flight to London …………….. for half an hour.
a. delayed b. is delayed c. has delayed d. has been delayed
3. Who is ……….. player in the team?
a. good b. better c. the best d. well
4. The Angkor Thon used ………. the royal capital city.
a. to being b. to be c. be d. being
5. When I came to visit her last night, she ……….. a bath.
a. is having b. was having c. has had d. had
6. Between the two boys, Harry is ……..
a. smarter b. smartest c. the smarter d. the smartest

1. C scared

2. A. should

3. A. knew

4. A. brushed

5. C. loved

6. B. aquarium

7. C. appointment

8. A. important

1. When did you see her?

2. Where was your father last month?

3. How did he travel to Nha Trang?

4. Why did she go to the doctor?

5. What did her neighbor give her?

6. When did they return to America?

7. Who bought a poster?

câu 8,9 giống với câu 3,4 nhé

10. How much does this dress cost?

11. How much does the book cost?

2. He lived in Vung Tau last year.

3. She went to work by bus yesterday.

4. He received a lot of gifts from his friends last week.

5. Children are scrared of seeing a dentist.

6. She hates the sound of the drill.

7. The doctor wanted to take his temperature yesterday.

8. He had a bad cold last Monday.

9. Did your mom write a sick note yesterday?

10. Lan traveled to Ho Chi Minh City last month.

1. C. rented

2. A. decided

3. C. great

4. A. much

5. A. fitted

6. C. called

7. D. watched

8. C. wear

9. D. hour

10. A. aquarium

11. D. present

12. C. material

13. D. experiment

14. B. repair