IX. Read the passage and then answer the questions below. (2ms)

            There are many different natural causes leading to natural disasters, and being aware of these causes enables us to be better prepared when they do arrive. One of the most common natural disasters is flooding, which occurs when a river bursts its banks and the water spills out onto the floodplain. During wet periods, flood warnings are often forecasted because of a great deal of heavy rain. There are other risk factors for flooding that we have to mention such as steep-sided channels cause landslide, the lack of plant and woodland break the flow of water. In other words, there is little to slow the floodwater down if forests disappear.

* Questions:

a) Why are there many natural disasters nowadays?

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b) What is the most common natural disaster?

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c) Do  the shortages of plant and woodland  cause flood?

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d) When does flood happen?

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Read the passage and fill the blanks with the given w

Natural disasters result from natural (1)___________of the earth.However,in the last five decades,human activities have contributed to increasing the number of natural disasters.More landslides haveoccurred as a result of(2)_______________. Because there are fewertrees in the forest,the soil becomes loosends and more easily to be flushed down.Industrialization and urbanization contribute to global warming,leading to more intense disasters of all kinds,including hurricanes and tsunami.It is more difficult to have exact(3)____________of climate patterns such as ElNino and La Nina.According to the Office of US Foreign disaster Assistance,the total natural disasters reported each year have been steadily increasingin recent(4)_______________.In 1980,there were only about 100 hydro-meteorological disasters reported per year but that number has risen to over 300 a year since 2000.If humans do not take action,natural disasters will become more tragic ans we won't be able to cope with the(5)_____________of Mother Nature.

Write the words in number form which consist of: 7 hundred thousands, 6 thousands, 3 hundreds, 4 tens and 2 units.
Answer: 

Câu 2:
Fill in the sequence with the missing number in order to have 3 consecutive natural numbers.
897;  ; 899

Câu 3:
Fill in the sequence with the missing number in order to have 3 consecutive natural numbers.
; 87; 88

Câu 4:
How many single digit numbers are there?
Answer:  numbers.

Câu 5:
6 is just after of 5 and 5 is just before of 6. What is the product of just after and just before of 10?
Answer: 

Câu 6:
Jean has 3014 beads. She has 497 beads less than Gillian. How many beads do they have altogether?
Answer: They have  beads altogether.

Câu 7:
There are 56 apples in a basket.  of them are green and the rest are red. How many red apples are there?
Answer: There are  red apples.

Câu 8:
The perimeter of a square garden is 36m. What is its area?
Answer: Its area is  .

Câu 9:
248 boys and 418 girls were divided into groups of 9. How many groups were there altogether?
Answer:  groups.

Câu 10:
Mr Junior bought 1 magazine, 1 book and 1 pen. The pen costs 5 dollar, the book costs 31 dollar more than the pen. The magazine costs twice as much as the book. How much did he spend on the three things?
Answer: He spent  dollar.

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

The Amazon rainforest is home to more than a third of all the world's species of plants, birds and animals. Twenty per cent of all the birds in the world live in the rainforest. Scientists have discovered thousands of types of plants and animals that can only be found there. There are thousands - probably millions more that we haven't discovered yet. There are at least 2.5 million species of insects there. Imagine what would happen if they all lost their home? It couldn't happen, could it? Unfortunately, it's happening right now. Yet, the rainforest is big. But it's getting smaller. The problem is that people are cutting down the trees, mainly to make room for cows. These provide meat and make money for their owners. This process of cutting down trees is called ‘deforestation'.

The good news is that it is slowing down. In 2004, for example, more than 27,000 square kilometres were cut down. That's an area bigger than Wales. In 2006, because of all the campaigns to save rainforest, it dropped to just over 13,000 square kilometres. The bad news is that it's not enough. Scientists predict that by 2030, the rainforest will have become smaller by 40%. It's possible that by the end of the 21st century, the rainforest will have completely disappeared. With deforestation, thousands of the animals, birds, fish and plants that live in the Amazon rainforest lose their home, their natural habitat. Some of them move to other areas, but most of them die. Many species have already become extinct, and many more will if deforestation continues. That will change the balance of life in the rainforest and could cause enormous problems to the region's ecosystem.

There's another problem too. Trees and plants are a vital source of oxygen. If we cut them down, we lose that oxygen. But it's worse than just that. With deforestation, the trees and plants are burnt. This sends gases into the Earth's atmosphere, which stops some of the Earth's heat escaping. That then leads to the temperature here on the ground going up. This increase in the world's temperature is called 'global warming', and most scientists believe it's a very serious issue. If they stopped deforestation, it might help prevent global warming.

Question. In paragraph 2, the word "it” refers to  ____.

A. room 

B. process

C. rainforest 

D. deforestation