Số nghiệm nguyên của bất phương trình ${\left(\frac{2}{3}\right)}^{x^2-3x-12}\ge \frac{9}{4}$ là:

Why is carbon monoxide called the silent killer?

Which of the following about carbon monoxide poisoning is true?

The word “them” in paragraph 5 refers to………

Read the following passage and choose the correct answer to each of the questions.

Carbon monoxide poisoning kills and injures many people and animals around the world. The gas has been a problem since people first began burning fuels to cook food or to create heat. It is a problem in all parts of the world that experience cold weather.

Carbon monoxide is called the silent killer because people do not know it is in the air. The gas has no color. It has no taste. It has no smell. It does not cause burning eyes. And it does not cause people to cough. But it is very deadly. It robs the body of its ability to use oxygen.

Carbon monoxide decreases the ability of the blood to carry oxygen to body tissues. It does this by linking with the blood. When the gas links with the blood, the blood is no longer able to carry oxygen to the tissues that need it.

Damage to the body can begin very quickly from large amounts of carbon monoxide. How quickly this happens depends on the length of time a person is breathing the gas and the amount of the gas he or she breathes in.

Carbon monoxide poisoning has warning signs. But people have to be awake to recognize them. Small amounts of the gas will cause a person’s head to hurt. He or she may begin to feel tired. The person may feel sick. The room may appear to be turning around. The person may have trouble thinking clearly. People develop severe head pain as the amount of gas continues to enter their blood. They will begin to feel very tired and sleepy. They may have terrible stomach pains.

Medical experts say carbon monoxide affects people differently. For example, a small child will experience health problems or die much quicker than an adult will. The general health of the person or his or her age can also be important. An older adult with health problems may suffer the effects of carbon monoxide more quickly than a younger person with no health problems. People with heart disease may suffer chest pains. They may begin to have trouble breathing.

The purpose of the passage is to ………

Mark the letter A, B, C, or D to indicate the word that is OPPOSITE in meaning to the underlined part in each of the following questions.

In cities, two of the most pressing problems facing the world to day also come together; poverty and environmental degradation.

Mark the letter A, B, C, or D to indicate the word that is OPPOSITE in meaning to the underlined part in each of the following questions.

Globally, farmers encroach on forest land to grow crops.

Stephanie was the last person to hand in the essay on the advantages and disadvantages of social networks.

By the time Pete telephoned me, I had already finished updating my social networking profile.

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

Soot comes from the incomplete combustion of coal, oil, wood and other fuels.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

People think that natural resources are never used up.

Lan: “You look great in that blue dress, Ngoc!” Ngoc: “……...”

Mark the letterA,B,C or D to indicate the correct response to each of the following exchanges

Ann: “In my opinion, some people should stay in rural areas as well as work on agriculture”

Mark: “………………”

What will be (18)………future for the Internet in France?

It has become essential to advertise product and service in this way and increasing number of companies are using this opportunity to (17)……….

In the world of business, no cooperation can be competitive (16)………it has access to the Internet.

Read the following passage and mark the letter A,B,C or D to indicate the correct word or phrase that best fits each of the numbered blanks.

YOU CAN'T ESCAPE THE INTERNET!

Over the last few years, the use of the internet has increased dramatically in French schools, offices and homes and this trend continues to grow. Who would have imagined, even in the last decade, that we would be able to contact our friends, colleagues and clients around the world simply (15)………..the click of a mouse or modem? There is no doubt that the Internet can be used for good and bad but it is here to stay and has revolutionized the way we communicate.

In the world of business, no cooperation can be competitive (16)………it has access to the Internet. It has become essential to advertise product and service in this way and increasing number of companies are using this opportunity to (17)……….a great number of potential consumers. Indeed, the bigger the website, the more professional the company seems to be.

What will be (18)………future for the Internet in France? Children, students and professionals will be able to log on and explore the world as they have never done before.

that we would be able to contact our friends, colleagues and clients around the world simply (15)………..the click of a mouse or modem?

If you read many books, you will have much knowledge.

We can't deny the potential influences of global communications on our cultural identity, as it will become even more powerful.

He ………………about his noisy neighbours five times today

Minh deleted his account after someone …………it.

Tony was totally opposed but if you give him some time to think about what you said. I'm sure he will…….. to your point of view.