People  in  cities  all  over  the  world  shop  in  supermarket. Who  decides  what  you  buy  in the supermarket? Do you decide? Does the supermarket decide?

When you enter the supermarkets, you see shelves full of food. You walk in the aisles between the shelves. You push a shopping cart and put your food in it.

            You probably hear soft, slow music as you walk along the aisles. If you hear fast music, you walk quickly. The supermarket plays slow music, you walk slowly and have more time to buy things.

            Maybe you go to the meat department first. There is some meat on sale, and you want to find it. The manager of the supermarket knows where customers enter the meat department. The cheaper meat is at the other end of the meat department, away from where the customers enter. You have to walk by all the expensive meat before you find the cheaper meat. Maybe you will buy some of the expensive meat instead of the meat on sale.

            The dairy department sells milk and milk products such as butter and cheese. Many customers like milk that has only little butterfat in it. One store has three different containers of low fat milk. One says ‘1% fat’ on the container. The second says ‘99 percent (99%) fat free’. The third says ‘Low fat’ in big letters and 1% in small letters. As you can see, all the milk has the same amount of fat. The milk is all the same. The amount of milk in each container is also the same. However, in this store they cost three different amounts of money. Maybe the customers will buy the milk that costs the most

1.What is the main topic of this passage?

A. How different kinds of food are arranged in supermarkets.

B. Soft, slow music makes people buy more in supermarkets.

C. The supermarket is designed to make you buy things.

D. Be sure not to be deceived in supermarkets

2. The manager knows __________.

A. which customers like low fat milk

B. which customers like slow music

C. where customers enter the meat department

D. where customers come from    

3. When you walk by the expensive meat __________ .

A. maybe you will buy some

B. maybe you will buy low fat milk

C. you will look for fresh food

D. you will walk on the shelves

4. The word “they” in the last paragraph means ______.

A. the customers                                               

B. the managers of the supermarket                    

C. the containers of low fat milk                               

D. the food in the supermarket

5. There are three different containers of low fat milk:

A. One has 99 percent of butterfat.  

B. They all cost the same amount of money.

C. One has less fat than the others.

D. They all have the same amount of fat.

cho tam giác ABC vuông tại A, có đường cao AH, tia phân giác AD của góc BAC (D thuộc BC) biết AB =3cm; AC =4cm. Tính độ dài BD và DC, mong mn giúp nhé!

Read the text then decide these sentences are true or false

CLIMATE CHANGE AND GLOBAL WARMING

Climate change

Climate change, also called global warming, refers to the rise in average surface temperatures on Earth. An overwhelming scientific consensus maintains that climate change is due primarily to the human use of fossil fuels, which releases carbon dioxide and other greenhouse gases into the air. The gases trap heat within the atmosphere, which can have a range of effects on ecosystems, including rising sea levels, severe weather events, and droughts that render landscapes more susceptible to wildfires.

The green house effect

While other planets in Earth's solar system are either scorching hot or bitterly old, Earth's surface has relatively mild, stable temperatures. Earth enjoys these temperatures because of its atmosphere, which is the thin layer of gases that cloak and protect the planet. However, 97 percent of climate scientists agree that humans have changed Earth's atmosphere in dramatic ways over the past two centuries, resulting in global warming The exchange of incoming and outgoing radiation that warms the Earth is often referred to as the greenhouse effect because a greenhouse works in much the same way. Incoming UV radiation easily passes through the glass walls of a greenhouse and is absorbed by the plants and hard surfaces inside. Weaker IR radiation, however, has difficulty passing through the glass walls and is trapped inside, thus warming the greenhouse. This effect lets tropical plants thrive inside a greenhouse, even during a cold winter.

Consequences of global warming

There are two major effects of global warming: the increase of temperature on the earth by about 30 to 50C (5.40 to 90Fahrenheit) by the year 2100 are Rise of sea levels by at least 25 meters (82 feet) by the year 2100. Other consequences are listed below:

• Sea levels are rising due to thermal expansion of the ocean, in addition to melting of land ice.

• Amounts and patterns of precipitation are changing.

• The total annual power of hurricanes has already increased markedly since 1975 because their average intensity and average duration have increased.

• Changes in temperature and precipitation patterns increase the frequency, duration, and intensity of other extreme weather events, such as floods, droughts heat waves, and tornadoes.

• Higher or lower agricultural yields, further glacial retreat, reduced summer stream flows, species extinctions.

• Diseases like malaria are returning into areas where they have been extinguished earlier

Circle the correct answers

l. Climate change is the rise in average surface temperatures on Earth.

a. true b. false

2.Climate change observed in the last decades is natural.

a. true b. false

3. Fossil fuels are burnt which releases carbon dioxide and other greenhouse gases into the air.

a. true b. false

4. Greenhouse effects have no impacts on our health.