Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.

22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.

23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.

24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.

25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~

Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.
22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.
23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.
24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.
25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~
  

IV.Read the passage. Decide which of the following statements is True(T), Palse(F) or No information(NI)

We are all destroying the Earth. The seas and rivers are too dirty to swim in it. These is so much smoke in the air that it's unhealthy to live in many of world's cities. We've cut down so many trees that there are now areas of wasteland all over the world. Farmers in many parts of Africa can not got grow enough to eat and in some Asian countries there is too little rice. Wild animals are quickly disappearing because we have killed too many. However, it isn't enough simply to talk about the problem. We must act before it's too late to do anything about it. Join us now. Save the Earth. This is too important to ignore

1._____ We can swim in the seas and rivers because they are not polluted now.

2._____ We are planting a lot of trees in areas of wasteland.

3._____ There isn’t rice enough to eat in many parts of Africa.

4._____ We are killing too many wild animals.

5._____ It’s not important to save the Earth.

6._____ It's pleasant to live in a lot of cities in the world now

7._____There are areas of wasteland now because many trees are cut down

8._____Rice can grow enough in many parts of Africa

9._____Animals are not as many now as they were a few years ago

10.____It's time to act if we want to save the Earth

Giúp mình nha!

Living in the country is something that people from the city often dream about. However, in reality, it has both its advantages and disadvantages.
There are certainly many advantages to living in the country. First of all, you can enjoy peace and quiet. Moreover, people tend to be friendlier and more open. A further advantage is that there is less traffic, so it is safer for young children.
However, there are certain drawbacks to life outside the city. Firstly , because there are fewer people, you are likely to have fewer friends. In addition, entertainment is difficult to find, particularly in the evening. Furthermore, the fact that there are fewer shops and services means that it is harder to find work. As a result , you may have to travel a long way to work, which can be extremely expensive.
In conclusion, it can be seen that the country is more suitable for some people than others.On the whole , it is often the best place for those who are retired or who have young children. In contrast , young, single people who have a career are better provided for in the city.

Yêu cầu đề: Make a list of all the advantages and disadvantages of trlevision, are mixed up. Put the notes into two lists.

Living in the country is something that people from the city often dream about. However, in reality, it has both its advantages and disadvantages.
There are certainly many advantages to living in the country. First of all, you can enjoy peace and quiet. Moreover, people tend to be friendlier and more open. A further advantage is that there is less traffic, so it is safer for young children.
However, there are certain drawbacks to life outside the city. Firstly , because there are fewer people, you are likely to have fewer friends. In addition, entertainment is difficult to find, particularly in the evening. Furthermore, the fact that there are fewer shops and services means that it is harder to find work. As a result , you may have to travel a long way to work, which can be extremely expensive.
In conclusion, it can be seen that the country is more suitable for some people than others.On the whole , it is often the best place for those who are retired or who have young children. In contrast , young, single people who have a career are better provided for in the city.

Yêu cầu đề: Make a list of all the advantages and disadvantages of trlevision, are mixed up. Put the notes into two lists.

Read the text and fill one suitable word in each numbered blank:

If you travel around the world,you will learn that _____ country has different customs.It is what _____ travelling so interesting! If you visit Thailand in April , you will see the Songkran celebrations - and you might ______ very wet! Songkran is the Thai New Year , and it is ______ to throw buckets of water at passers - by on the street! If you did that in London , you might get arrested!

Different countries have different laws, so you _______ to be careful. Of course stealing and murder are illegal everywhere, but some laws are surpring. In England, if you buy a stamp with the Queen's head on it, you must make ______ you stick it on your letter the right way up. It is illegal to stick the stamp on a letter upside-down. It shows that you do not respect the Queen.

Many laws in England were made centuries _______ . As time passes, they are not important any more, but they have not been changed. For example, did you know that it is illegal to wear a top hat in the city of London? And in the seventeenth century Oliver Cromwell banned _______ mince pies on Christmas Day. Mince pies are a traditional Christmas treat, so millions of people in UK break that law every Christmas. There are hundreds of laws ______ this, which seem stupid to us now. _______ 1965 over 2000 old laws have been changed, but there are thousands more - so be careful!

đọc đoạn văn vad tl câu hỏi : Mrs. Lien is a nurse. Her house is near the hospital. It is in front of the park, between the drugstore and the bakery. Today she doesn't go to work because it's Sunday. There are five rooms in her house, and the house has a small yard. To the right of the house, there are flowers and there are small trees to the lefl of it. There is a well behind her house ///// 1. What does Mrs. Lien do??? 2. How many rooms in her house have??? 3. Is the yard big or small?? 4. Where are the flowers??? 5. What is there behind her house??

Living in the country is something that people from the city often dream about. However, in reality, it has both its advantages and disadvantages.
There are certainly many advantages to living in the country. First of all, you can enjoy peace and quiet. Moreover, people tend to be friendlier and more open. A further advantage is that there is less traffic, so it is safer for young children.
However, there are certain drawbacks to life outside the city. Firstly , because there are fewer people, you are likely to have fewer friends. In addition, entertainment is difficult to find, particularly in the evening. Furthermore, the fact that there are fewer shops and services means that it is harder to find work. As a result , you may have to travel a long way to work, which can be extremely expensive.
In conclusion, it can be seen that the country is more suitable for some people than others.On the whole , it is often the best place for those who are retired or who have young children. In contrast , young, single people who have a career are better provided for in the city.