Look at your classmates around you. You all wear the same uniform and similar sneakers. Do you want to stand out among them? A fashionable and useful backpack can be a great idea!
Backpacks are lightweight and easy to carry.
They are great tools for students. They help you to stay organized. You can keep school things, books and personal items like cell phones and keys neatly (整洁地). With a unique backpack, you can also stand out among your classmates.
Tourists also love backpacks. With convenient backpacks, backpackers can move freely from one place to another. Meanwhile, they can also free their hands to do other things like taking photos.
But in the very beginning backpacks were not what we see today.
It is thought that US hiker Dick Kelty invented the first modern backpack in 1951. He used nylon (尼龙) and aluminum tubing (铝制管型材料) to make backpacks lightweight. Then he added shoulder straps (带子) and waist straps to transfer(转移) much of the weight to the hips (臀部).
Today, backpacks come in different styles.
Rolling (滚动的) backpacks have wheels on the bottom. Users can pull them along the ground if they are too heavy to carry on their shoulders.
And with more people bringing laptops to school and work, backpacks also offer space for lightweight electronics.
【小题1】 Backpacks are useful for tourists because_____.

A long walk in the desert or the mountains can be exciting. And it’s a great way to keep fit. If you carry a tent and some food, you can camp overnight. But wild places can be dangerous. Here’s how you can enjoy walking and camping safely.
Before your trip
☆ Tell someone where you are going and when you expect to return. If you don’t return on time, the people at home will know that you are lost or in trouble. They will know where to look for you.
☆ Make sure you’ve got a good map of the area that you’re going to.
☆ Make sure you’ve packed the right equipment for your activities. The desert is often hot, but nights can be very cold, and sometimes there are big rainstorms. In the mountains, the weather can change suddenly. A sunny day can turn cold and cloudy quickly.
The tools for survival(生存)
Sunglasses, sun hat, sun cream, windproof jacket, good walking shoes or boots, food, water, maps, compass, first-aid kit, matches, rope, knife, ground sheet,
the pack to carry your equipment.
What to do if you get lost
☆ If you’re in a car and it has broken down, stay with your car.
☆ If you are not traveling by car, make yourself easy to see. A signal fire can be seen at night. During the day, smoke may be used to show where you are. A brightly-colored blanket(毯子) may help rescuers to find you.
☆ Stay where you are.
☆ If you walk for any reason, avoid walking during the hottest part of the day. Morning and evening walking is better for saving your energy water.
☆ Keep yourself away from the rain, wind and sun, but remember: try to make yourself be in sight.
【小题1】According to the passage, we should make a fire to _________. 

A long walk in the desert or the mountains can be exciting. And it’s a great way to keep fit. If you carry a tent and some food, you can camp overnight. But wild places can be dangerous. Here’s how you can enjoy walking and camping safely.
Before your trip
☆ Tell someone where you are going and when you expect to return. If you don’t return on time, the people at home will know that you are lost or in trouble. They will know where to look for you.
☆ Make sure you’ve got a good map of the area that you’re going to.
☆ Make sure you’ve packed the right equipment for your activities. The desert is often hot, but nights can be very cold, and sometimes there are big rainstorms. In the mountains, the weather can change suddenly. A sunny day can turn cold and cloudy quickly.
The tools for survival(生存)
Sunglasses, sun hat, sun cream, windproof jacket, good walking shoes or boots, food, water, maps, compass, first-aid kit, matches, rope, knife, ground sheet,
the pack to carry your equipment.
What to do if you get lost
☆ If you’re in a car and it has broken down, stay with your car.
☆ If you are not traveling by car, make yourself easy to see. A signal fire can be seen at night. During the day, smoke may be used to show where you are. A brightly-colored blanket(毯子) may help rescuers to find you.
☆ Stay where you are.
☆ If you walk for any reason, avoid walking during the hottest part of the day. Morning and evening walking is better for saving your energy water.
☆ Keep yourself away from the rain, wind and sun, but remember: try to make yourself be in sight.

1. 1.

   According to the passage, we should make a fire to _________. 

   1. A.
      show where we are
   2. B.
      keep warm at night
   3. C.
      cook our meal
   4. D.
      drive animals away
2. 2.

   If we get injured, we can choose ________from the following tools.

   1. A.
      a ground sheet
   2. B.
      a first aid kit
   3. C.
      matches
   4. D.
      sun cream
3. 3.

   What can we know from the passage?

   1. A.
      A map and a compass will show the right direction to us.
   2. B.
      It is a secret for us to tell where to go or when to return.
   3. C.
      We should leave our car when it breaks down in the desert.
   4. D.
      We have to keep walking while the sun is shining brightly.

Take a look at the label(标签) on almost any bottle of milk and you may see the word PASTEURIZED. What does that mean? Let’s find out by meeting Louis Pasteur.

Louis Pasteur was born in 1822 in a little town in France. As he grew up, he loved to paint. He loved to look at the world around him. When he went to college in Paris, he showed interest in looking through a microscope. A microscope makes things look a lot bigger; it lets you see things you can’t see just with your eyes. Looking through a microscope, Pasteur found a living world in a drop of water. He saw and drew pictures of the small living things -- he called them “microbes” or “germs”-- that crowded in a drop of water.

One day a winemaker came into the lab, hoping that someone could help him with his problem. “Sometimes my wine tastes delicious, but sometimes terrible,” he said to Pasteur. “Can you help me find out why?”

Pasteur put some drops of the wine under the microscope. He noticed that the terrible wine had some unusual germs. If he killed these germs, maybe he could keep the wine from turning terrible. He tried with different ways to kill the germs. In the end he found heating (加热) the wine seemed to work best. The winemaker tried it, and every bottle of wine tasted good.

Pasteur’s idea worked for other people, too. When farmers heated milk, it didn’t turn bad so quickly. When breweries heated beer, it tasted better. People called it “pasteurization” ---heating a liquid to kill bad germs. Aren’t you glad that the milk you drink has been pasteurized?

1. The Chinese meaning for the word “microbes” is____.

2. Which is the right order in Pasteur’s life story?

(1). He received college education in Paris.

(2) He helped to find some unusual germs in some drops of wine.

(3) A new way of killing bad germs--pasteurization was found out.

(4)He was born in 1822 in a little town in France.

(5) Microbes were found by Louis Pasteur with the help of a microscope.

3. What do you think Louis Pasteur was like from the passage?

4.Which of the following is TRUE according to the passage?

5. What does the passage mainly tell us?