Ann and Bob have a large number of sweets which they agree to share according to the following rules. Ann will take one sweet, then Bob will take two sweets and then taking turns, each person takes one more sweet than what the other person just took. When the number of sweets remaining is less than the number that would be taken on that turn, the last person takes all that are left. To their amazement, when they finish, they each have the same number of sweets

They decide to do the sharing again, but this time, they first divide the sweets in two equal piles and then thay repeat the process above with each pile. Ann going first both times. They still finish with the same number of sweets each. 

What is the maximum number of sweets less than 1000 they could have started with ?

A. Calories are units of energy. They refer to the amount of energy you get from foods and drinks, and the amount of energy you use through physical activities. For example, an apple has about 80 calories, while a 1.6 km walk might use up 100 calories. Calories are important for human health, and the key is having the right amount of it.

B. Everyone needs different amounts of energy per day depending on age, size and activity levels. An athlete needs more calories than an office worker. To stay in shape, an average adult requires at least 1,800 calories per day (according to the Food and Agriculture Organization of the United Nations). If we eat just the number of calories our body needs each day, we will probably be healthy. However, eating too much can make you put on weight. To lose weight, eat fewer calories than your body burns each day.

C. These are some experts' tips to reduce calorie intake. First, you must know how many calories you need each day and always count them in your diet. Have small frequent meals and drink more water too. This will help you feel less hungry. Furthermore, avoid all sugary drinks and junk food. They are high in energy but low in nutritional value.

What is a healthy number of calories per day?

A. At least 160 calories

B. About 80 calories

C. At least 1,800

D. None are correct.

Chọn thông tin đúng về bài đọc sau.

A. Calories are units of energy. They refer to the amount of energy you get from foods and drinks, and the amount of energy you use through physical activities. For example, an apple has about 80 calories, while a 1.6 km walk might use up 100 calories. Calories are important for human health, and the key is having the right amount of it.

B. Everyone needs different amounts of energy per day depending on age, size and activity levels. An athlete needs more calories than an office worker. To stay in shape, an average adult requires at least 1,800 calories per day (according to the Food and Agriculture Organization of the United Nations). If we eat just the number of calories our body needs each day, we will probably be healthy. However, eating too much can make you put on weight. To lose weight, eat fewer calories than your body burns each day.

C. These are some experts' tips to reduce calorie intake. First, you must know how many calories you need each day and always count them in your diet. Have small frequent meals and drink more water too. This will help you feel less hungry. Furthermore, avoid all sugary drinks and junk food. They are high in energy but low in nutritional value.

What is a healthy number of calories per day?

A. At least 160 calories

B. About 80 calories

C. At least 1,800

D. None are correct.

Chọn thông tin đúng về bài đọc sau.

A. Calories are units of energy. They refer to the amount of energy you get from foods and drinks, and the amount of energy you use through physical activities. For example, an apple has about 80 calories, while a 1.6 km walk might use up 100 calories. Calories are important for human health, and the key is having the right amount of it.

B. Everyone needs different amounts of energy per day depending on age, size and activity levels. An athlete needs more calories than an office worker. To stay in shape, an average adult requires at least 1,800 calories per day (according to the Food and Agriculture Organization of the United Nations). If we eat just the number of calories our body needs each day, we will probably be healthy. However, eating too much can make you put on weight. To lose weight, eat fewer calories than your body burns each day.

C. These are some experts' tips to reduce calorie intake. First, you must know how many calories you need each day and always count them in your diet. Have small frequent meals and drink more water too. This will help you feel less hungry. Furthermore, avoid all sugary drinks and junk food. They are high in energy but low in nutritional value.

What is a healthy number of calories per day?

A. At least 160 calories.

B. About 80 calories.

C. At least 1,800.

D. None are correct.

Chon dap an dung:

1.....students volunteer each year for environmental projects

A. A number of        B. A great deal of      C. The numbet of     D. An amount of

2. Bob used to have...friends in New York

A. a great deal of      B. a little       C. a lot of       D. an amount of

3....victims agreed not to tell anyone about what had happened

A. most of      B. a great deal of       C. an amount of      D. most

4. We use...paper in the officer every day

A. a few      B. an amount of      C. a number of        D. a majority of

5. We want to hear the opinions of...people

A. a good deal of      B. a variety of      C. an amount of      D. a great deal of

6. She spent...time on the project

A. a number of     B. a great deal of      C. the number of     D. a few of

7....research has been done already

A. a great many     B. a number of     C. a great deal of      D. a majority of

8. There were...cake left but not enough for everyone

A. any      B. much        C. both        D. some

9. There is...tiem to prepare for the exams

A. many     B. little       C. a few       D. many

10. Don't hurry! There is still....time to finish the game

A. any      B. a little       C. few       D. many

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 following questions.

Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun. In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than at the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas. This explanation, however, is of little use to most average people.

Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers: their atomic number, which is equal to the number of protons they have, and their atomic weight, which is equal to total number of their neutrons and protons. In most lighter atoms, the number of neutrons and protons is equal, and the element is stable. In heavier atoms, however, there are more neutrons than protons, and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached.

According to paragraph 2, an atom's atomic number is determined by __________. 

A. the sum of its protons and electrons 

B. the difference in the mass of its neutrons and protons 

C. the strength of the bond between its protons and neutrons 

D. the total number of protons it has 

I.Fll in the each number space with One appropriate word:

the      organized      team        well      good         a

Volleyball is a (1)............. sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team’s court under(2).............rules. It has been a part of the official program of the Summer Olympic Games since 1964.

Today,(3)..........number of consistent techniques have evolved in volleyball, including spiking and blocking ( because these plays are made above the top of the net, the vertical jump is an athletic skill emphasized in the sport) as (4)............as passing, setting, and specialized player positions and offensive and defensive structures.