Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best first each of the numbered blanks from 01 to 05. Fill in the appropriate word in question 02

Nowadays people are more aware that wildlife all over the world is in (01) _____________. Many species of animals are threatened, and could easily become (02) _____________ if we do not make an effort to protect them. In some cases, animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught (03) _____________ and sold as pets. For many animals and birds the problem is that their habitat - the place where they live - is disappearing. More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them to grow better crops, but these chemicals pollute the environment and (4) _____________ wildlife. The most successful animals on earth – human beings - will soon be the only ones (5) _____________, unless we can solve this problem.

A. disappeared

B. vanished

C. extinct 

D. empty

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

        Very few people in the modem world obtain their food supply by hunting and gathering in the natural environment surrounding their homes. This method of harvesting from nature s provision is the oldest subsistence strategy, and has been practiced for at least two million years. It was, indeed, the only way to obtain food until rudimentary farming and the domestication of animals were introduced about 10,000 years ago.

                   Because hunter-gathers have fared poorly in comparison with their agricultural cousins, their numbers have dwindled, and they have been forced to live in marginal environments such as deserts forests or arctic wasteland. In higher latitudes, the shorter growing season has restricted the availability of plant life. Such conditions have caused a greater independence on hunting, and along the coasts and waterways, on fishing. The abundance of vegetation in the lower latitudes of the tropics, on the other hand, has provided a greater opportunity for gathering a variety of plants. In short, the environmental differences have restricted the diet and have limited possibilities for the development of subsistence societies. Contemporary hunter-gathers may help us understand our prehistoric ancestors. We know from observation of modem hunter- gathers in both Africa and Alaska that society based on hunting and gathering must be very mobile. While the entire community camps in a central location, a smaller party harvests the food within a reasonable distance from the camp. When the food in the area is exhausted, the community moves on to exploit another site. We also notice a seasonal migration on pattern evolving for most hunter gathers, along with a restrict division of labor between sexes. These patterns of behavior may be similar to those practiced by mankind during the Paleolithic Period.

The word “rudimentary” is closest in meaning to _________.

A. rough    

B. preliminary       

C. ancient    

D. backward

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

  When we talk about living a healthy life, there is a famous old saying, you are what you eat. In fact, it is not just what people eat, but their whole lifestyle, which is important. The best way to stay healthy is to live a balanced lifestyle. Are you living a balanced lifestyle both physically and mentally?

Physical Balance

  The human body needs physical exercise at least once a day. In today’s world, many working people spend most of their day sitting at a desk. To add more exercise to your daily life, try to stop what you are doing about once an hour and stretch or take a short walk. After work, take a brisk walk or go to the gym. Your body will thank you for it.

  For good health, nutritionists say we should eat at least four servings of raw food a day. By eating many colorful fruits and vegetables, you can be sure you are getting the correct nutrients. Have a red apple with your breakfast, a green salad at lunch, some carrots for your afternoon snack, and grapes for dessert instead of cake or cookies. Of course, for a healthy balance, your body also needs other foods.

Mental Balance

  Mentally balanced people are usually emotionally balanced. They are generally happy with the things they have. They do not need to have more and more things. A mentally balanced person also feels good about who they are. They don’t worry about the past, and generally have good relationships with the people around them. That doesn’t mean that mentally healthy people never have negative feelings, but they don’t let these types of feelings control them or their behavior. It’s normal for people to feel their emotions-life always has its challenges and tragedies. But mentally healthy people face those challenges and resolve them quickly instead of allowing them to take control of their lives. By taking a little time each day to eat well, exercise, and clear your mind, anyone can live a more balanced and healthier lifestyle.

Which statement is true, according to the article?

A.   only be eaten raw. 

B. A healthy, balanced lifestyle is difficult for most people. 

C. People should exercise at least four times a day. 

D. Mentally healthy people also face challenges and tragedies.

Hòa tan hoàn toàn 1 mol CuFeS₂ bằng H₂SO₄ đặc nóng thấy thoát ra n mol SO₂. Giá trị của n là:

A. 6,5

B. 7,5

C. 8,5

D. 9,5

Thành phần nào sau đây không thuộc Operon Lac?

A. Gen điều hòa (R)

B. Vùng vận hành (O)

C. Vùng khởi động (P) 

D. Các gen cấu trúc (Z,Y,A.)

Dựa vào hình bên , cho biết phát biểu đúng  nào là đúng 

A. 2, 3 Enzim tháo xoắn tách mạch,

6. Enzim ADN polimeaza.

7. ARN polimeaza

1.okazaki 

B. 2, 3 Enzim tháo xoắn tách mạch

6. Enzim ADN polimeaza.

7.Enzim tổng hợp mồi 

1. mạch liên tục

C. 2, 3 Enzim tháo xoắn tách mạch

6. Enzim ADN polimeaza.

7.Enzim nối

4. mạch mới  liên tục

1. đoạn okazaki

D. 2, 3 Enzim tháo xoắn tách mạch

6. Enzim ADN polimeaza.

7. ligaza

4 . Đoạn okazaki

Một phân tử ADN mạch kép có 20% số nucleotit loại A. Theo lí thuyết, tỉ lê nucleotit loại G của phân tử này là:

A. 40%

B. 10%

C. 30%

D. 20%