Khảo sát sự biến thiên và vẽ đồ thị hàm số:

a) y= x⁴+2x²-3

b) y= -x⁴-4x-1

Khảo sát sự biến thiên và vẽ đồ thị hầm số:

a) y= x⁴+2x²-3

b) y= -x⁴-4x-1

Chọn đáp án đúng:

1. I requested that he...the work on time

A. finishes       B. will finish       C. finish       D. finished

2. It is necessary that she...the club

A. join       B. joins        C. would join        D. has joined

3. The doctor suggested that the patient...smoking

A. stop     B. should stop       C. would stop       D. both A and B are correct

4. It is impotant that you...on time

A. comes       B. coming        C. having come      D. come

5. It is necessary that she...the housework

A. do       B. would do      C. doing       D. done

6. They requested that I...early

A. leave         B. should leave       C. left        D. A or B

7. It is our wish that he...what he please

A. is doing       B. does       C. do        D. should have done

8. I propose that the minutes of the previous meeting...read

A. to be       B. be        C. being        D. should have been

9. The court ordered that the man...released

A. be        B. was       C. is         D. has been

10. It is essential that he...the bike

A. to repair       B. should repair       C. would repair      D. had better repair

11. I would rather that you...me tomorrow

A. call       B. to call        C. calling        D. will call

12. John would rather...than worked last night

A. slept      B. was sleeping        C. have slept        D. had slept

Chọn đáp án đúng: B. I wish it was rain tomorrow. 3. He likes to swim. ->He wishes he ……………… near the sea. D. If only it had rained. A. liked B. living 4. She wishes she ………………. blue eyes. C. lives D. to live A. has B. had C. had had D. would have 5 If only I ___ him now. A. see B. saw 6. I wish it ___ a holiday today. C. have seen D. seen A. were B. will be 7.. What a pity I didn‘t meet you yesterday. C. is D. had been A. If only I met you yesterday. B. If only I meet you yesterday. C. If only I had met you yesterday. 8.. Susan regretted not buying that villa. D. If only I hadn‘t met you yesterday. A. Susan wished she had bought that villa. B. Susan wished she bought that villa. C. Susan wished she could buy that villa. 9. It‘s a pity that you didn‘t tell us about this. D. Susan wished she hadn‘t bought that villa. A. I wish you told us about this. B. I wish you would tell us about this. C. I wish you had told us about this. 10. He wishes he …………… buy a new car. D. I wish you have told us about this. A. can B. will 11. Those children are really noisy. C. could D. would A. I wish they were quieter B. I wish they would be quiet C. If only they were quieter D. Both A and C are correct 12. She misses him. She wishes he ……………. her a letter. A. would send B. will send C. has sent D. would have sent 13. I wish I …….................... help you. A. would B. can C. could D. will 14. She wishes she ……………………. him yesterday. A. would meet B. meets C. met D. had met 15. Yesterday, John told me that he wishes he ________ harder in high school because then university might not be so difficult for him. A. studied B. would study C. had studied D. studies 16. If only my motorbike………………broken down again, I would have arrived on time A. would B. hadn‘t C. didn‘t 17. I wish I _________ in prison, but I am D. wasn‘t A. wasn't B. am not C. weren't 18. I wish you……………. make that noise, it‘s annoying! D. were A. don't B. wouldn't C. would D. couldn't 19. I wish I……………………………. to the movies with you last night. A. went B. did go C. could go 20.. I hate Canadian winters. I wish I ______ in Hawai right now. D. could have gone A. was B. am C. will be D. were

Trả lời câu hỏi:

1. What are the differences between a big company and a small company?

2. What factors can effect a company's development?

4. Why is the companies's self-regulation important?

Trả lời câu hỏi:

1. What is your job?

2. Where do you work?

3. Do you like your job? Why?

4. Why did you choose that job?

5. Is it popular job in your country?

Chọn đáp án đúng:

Attention, all students:
In the last two weeks, several students have been caught violating the school’s dress code. On account of that, I would like to list which clothes are acceptable and which are not.
Boys must wear long pants and button-down shirts. These shirts must have collars since all boys have to wear neckties as well. Furthermore, boys must wear either dress shoes or nice shoes. Sneakers, sandals, jeans, shorts, T-shirts, sleeveless shirts, tank tops, and other similar casual articles of clothing
are not allowed.
Girls must wear slacks or skirts as well as blouses. All skirts must go down below the knees of the students wearing them. Girls may also wear dresses so long as they are not too formal. The clothes that are prohibited for boys may also not be worn by girls.
Students who violate the dress code will be sent to their homes to change and be given detentions or suspensions. Multiple violations of the dress code will result in them being sent to the principal’s office. We insist that all students (comply with) the dress code. Should you have any objections to the school’s
dress code, I am willing to speak with you about them.
Tina Wimberley
Principal

31.What is the purpose of the notice?
A. To announce that the dress code has been abolished
B. To punish some students for wearing improper clothes
C. To inform students about the school’s dress code
D. To advise students to wear uniforms every day
32.What does the author say about clothing for boys?
A. They are supposed to wear ties to schools.                                                     B. They may wear jeans or shorts to school.
C. T-shirts are acceptable clothing for them.                                                        D. Their clothes must be ironed and look nice.
33.In the fourth paragraph, the word “them” refers to _____.
A. students                                      B. their homes
C. detentions or suspensions          D. multiple violations
34.What can be inferred from the notice about Tina Wimberley?
A. She is planning to make the school’s dress code more casual.
B. She works as a teacher in addition to serving as school principal.
C. She recently began her employment at the school.
D. She expects some students to violate the school’s dress code
35.The phrase “comply with” in the last paragraph is closest in meaning to _____?
A. think about    B. adhere to    C. agree with    D. be proud of

Chọn trọng âm khác:

Question 3. A. precede      B. offer        C. visit        D. finish
Question 4. A. charity        B. agency    C. origin     D. disaster

Chọn đáp án đúng:

Today, bicycles are elegantly simple machines that are common around the world. Many people ride bicycles for recreation, whereas others use them as a means of transportation. The first bicycle, called a draisienne, was invented in Germany in 1818 by Baron Karl de Drais de Sauerbrun. Because it was made of wood, the draisienne wasn’t very durable nor did it have pedals. Riders moved it by pushing their feet against the ground.
    In 1839, Kirkpatrick Macmillan, a Scottish blacksmith, invented a much better bicycle. Macmillan’s machine had tires with iron rims to keep them from getting worn down. He also used foot- operated cranks, similar to pedals, so his bicycle could be ridden at a quick pace. (It) didn’t look much like the modern bicycle, though, because its back wheel was substantially larger than its front wheel.
Although Macmillan’s bicycles could be ridden easily, they were never produced in large numbers.
    In 1861, Frenchman Pierre Michaux and his brother Ernest invented a bicycle with an improved crank mechanism. They called their bicycle a vélocipède, but most people called it a “bone shaker” because of the jarring effect of the wood and iron frame. Despite the unflattering nickname, the vélocipède was a hit. After a few years, the Michaux family was making hundreds of the machines
annually, mostly for fun-seeking young people.
    Ten years later, James Starley, an English inventor, made several innovations
that (revolutionized) bicycle design. He made the front wheel many times larger than the back wheel, put a gear on the pedals to make the bicycle more efficient, and lightened the wheels by using wire spokes. Although this bicycle was much lighter and less tiring to ride, it was still clumsy, extremely top-heavy,
and ridden mostly for entertainment.
    It wasn’t until 1874 that the first truly modern bicycle appeared on the scene. Invented by another Englishman, H. J. Lawson, the safety bicycle would look familiar to today’s cyclists. The safety bicycle had equal-sized wheels, which made it much less prone to toppling over. Lawson also attached a chain to the pedals to drive the rear wheel. By 1893, the safety bicycle had been further improved with air-filled rubber tires, a diamond-shaped frame, and easy braking. With the improvements provided by Lawson, bicycles became extremely popular and useful for transportation. Today, they are built, used, and enjoyed all over the world.

Question 44: Macmillan added iron rims to the tires of his bicycle to ______.
A. add weight to the bicycle         B. make the tires last longer
C. make the ride less bumpy       D. make the ride less tiring
Question 45: The underlined word “it” in the second paragraph refers to ______.
A. his bicycle    B. quick pace    C. back wheel    D. front wheel
Question 46: Which of the following would be the most uncomfortable bicycle to ride?
A. Starley’s bicycle                B. the vélocipède
C. the modern bicycle           D. the safety bicycle
Question 47: The first person to use a gear system on the bicycles was ______.
A. H. J. Lawson             B. Kirkpatrick Macmillan
C. Pierre Michaux         D. James Starley
Question 48: The underlined word “revolutionized” in the fourth paragraph most nearly means ______.
A. cancelled                            B. became outdated
C. changed drastically            D. exercised control over
Question 49: There is enough information in this passage to show that ______.
A. several people contributed to the development of the modern bicycle
B. only a few vélocipèdes built by the Michaux family are still in existence
C. for most of the nineteenth century, few people rode bicycles just for fun
D. bicycles with wheels of different sizes cannot be ridden easily

Chọn đáp án đúng:

Virtually any night of the year, a person can look up at the sky and see the moon. The moon is Earth’s only natural satellite. It takes slightly more than twenty-seven days for it to orbit Earth. And it does so from a little more than 380,000 kilometers away. Despite being Earth’s closest celestial neighbor, there is much about the moon that scientists do not know.
   For instance, no one is exactly sure when the moon was formed. Earth is (estimated) to have been created around 4.5 billion years ago. No later than 100,000 years after that, the moon was in orbit around Earth. Yet the remains: How did the moon form? There are several theories, but astronomers have thus far failed to prove any of them correct. The most widely accepted idea is the collision theory. It states that the moon formed when an object (crashed into) Earth. According to this hypothesis, when Earth was first created, it had no satellite. But, at some point in time, an object approximately the size of Mars collided with Earth. This caused part of the planet to break off. The largest part eventually transformed into the moon. Another theory is that Earth and the moon formed at the exact same time billions of years ago. However, many astronomers discount this theory. They point out that Earth and the moon are comprised of different substances. They claim that if the two bodies were formed at the same time, then they should be composed of the same materials. Yet, as an example of their differences, the moon has less iron than Earth does. A third theory proposes that the moon formed somewhere else in the solar system. As it wandered past Earth, it was captured by Earth’s gravity and began to orbit the planet. A fourth theory declares that, when (it) first formed, Earth spun much more rapidly than it does at the present time. Due to its swift rotation, part of the crust was stripped away from the planet and cast into space. This material then formed the moon. 

   Each of the theories has its supporters and detractors. Thus far, however, no astronomer has been able to prove one theory while disapproving all of the others.

36.What would be the best title for the passage?
A. How Long Ago Did the Moon Form?
B. Theories on the Creation of the Moon
C. The Moon: Everything You Need to Know about It
D. The Changing Phases of the Moon
37.Which of the following statements does paragraph 1 support?
A. The moon is always visible in the night sky.
B. The moon spends no more than twenty-seven days orbiting Earth.
C. The moon’s distance from Earth changes at times.
D. No natural objects are closer to Earth than the moon.

38.The word (estimated) in the second paragraph is closest in meaning to _____.
A. presumed    B. known    C. determined    D. thought
39.The phrase (crashed into) in the second paragraph is closest in meaning to _____.
A. passed    B. hit    C. interfered with    D. affected
40.Which of the following is true regarding the collision theory?
A. It declares that Mars collided with Earth at one point.
B. It points out that Earth’s orbit changed a great deal.
C. It is believed by the greatest number of astronomers.
D. It states that Earth once had multiple satellites.
41.Why do many astronomers doubt that Earth and the moon formed at the same time?
A. Earth and the moon are formed of different materials.
B. The moon more likely came elsewhere in the solar system.
C. There is not enough iron in the Earth’s crust.
D. The chances of two objects forming close together are small.
42.The word it in the passage refers to _____.
A. a fourth theory            B. the planet’s gravity
C. Earth                          D. the Solar System

   Each of the theories has its supporters and detractors. Thus far, however, no astronomer has been able to prove one theory while disapproving all of the others.

Chọn từ giao tiếp:

25.Jack and Betty are talking about Jacob, who was offered a job last week.
- Jack: “I think Jacob is the best person for the job.”
- Betty: “_____.”
A. Absolutely. I’ll be amazed if he doesn’t get it
B. I don’t quite agree. He does good job
C. It’s right. He should decline that offer
D. My pleasure. He will

Sửa lỗi sai:

43.When I see him last night, I invited him to dinner.
A. see    B. night    C. invited    D. to
44.When babies first learn to stand, they hold on to something to support ourselves.
A. first     B. to stand    C. hold on to    D. ourselves
45.Ella's angry outburst was so expectant that Mike really didn't know what to say.
A. what    B. outburst    C. really     D. expectant

Chọn đáp án đúng:

46.The last time Emily ate a pizza was three months ago.
A. Emily has been eating a pizza for three months.
B. Emily last ate a pizza for three months.
C. It is three months ago since Emily ate a pizza.
D. Emily hasn’t eaten a pizza for three months.

48.It is unnecessary for you to worry about the exams.
A. You don’t have to worry about the exam.
B. You may not worry about the exam.
C. The exam is not difficult enough for you to be worried so much.
D. You mustn’t worry about the exam.

50.Brian entered the shop. He realized only then that there was danger.
A. Only after entering the shop did Brian realize that there was danger.
B. Only when he entered the shop then Brian realized that there was danger.
C. Not until Brian entered the shop, he realized that there was danger.
D. It was not until Brian entered the shop did he realize that there was danger.