1 . In 1620, about half the USA was covered by forests.   Today the forests have almost gone.   A lot of good land has gone with them, leaving only sand.   China doesn’t want to copy the USA’s example.   We’re planting more and more trees.   We’ve built the “ Great Green Wall” of trees across northern part of our country. The Great Green Wall is 7,000 kilometres long, and between 400 and 1,700 kilometres wide.   It will stop the wind from blowing the earth away.   It will stop the sand from moving towards the rich farmland in the south.   More “Great Green Walls” are needed.   Trees must be grown all over the world.   Great Green Walls will make the world better.

1. In 1620, about ________ the USA was covered by forests.

A．a third

B．half

C．two thirds

D．a fourth

2. A lot of good land has gone with ________.

A．sand

B．water

C．wind

D．forests

3. The Great Green Wall in China is ________ long.

A．7,000 kilometers	B．1,700 kilometers
C．7,000 meters	D．400 kilometers

4. Trees must be grown in ________.

A．China	B．the USA
C．some countries	D．every part of the world

5. ________ will make the world better.

A．The Great Wall	B．Tall buildings
C．Great Green Walls	D．Flowers and grass

2 . Rather than continue living a comfortable urban life, this British family has sold their London home in favor of launching the world's smallest nature reserve to save a nation's coral reef system. Karolina and Barry Seath— along with their two young daughters—are preparing to move to an island in the Seychelles（非洲塞舌尔群岛） measuring just 1,300 feet long by 980 feet wide（400 by 300 meters）.

They've launched a charity and teamed up with（与.....合作）local biologists in an effort to bring the coral reefs back to life in the smallest African country, which have been almost wiped out by rising sea temperatures. Their land-based coral farm will be only the second of its kind in the world, the other being on Australia's Great Barrier Reef, to specialize in regrowing coral to restore the reefs.

47-year-old Barry, who is a former policeman, said, “We are just a normal husband, wife and two kids, living the sort of life that most others do, but we felt the need to make a positive change for ourselves, our children, and the world we had largely taken for granted.”

Over the course of several vacations to the Seychelles, the Seaths witnessed the gradual deterioration（恶化） of the reefs. "Every time we visited, we noticed the coral was getting worse and worse," said Barry. "All the tourists say the same thing. They love the beaches but are really disappointed with the coral. "

Barry felt it was time to make a change and show his daughters an alternative way of eco-friendly living. He then teamed up with experts at the Marine Conservation Society Seychelles in order to develop the facility. Once it is complete, it will be the first large-scale, land-based coral farm in the Indian Ocean. The eco-warriors hope to use the facility to grow around 10,000 corals per year. Barry said, "Our long-term goal is to show everyone that—with just a relatively small investment—you can have a big positive influence on the marine （海的） environment."

1. Why have Karolina and Barry Seath sold their house?

A．They need to collect enough money to set up a charity.

B．They will move to an island in the Seychelles to save coral.

C．They think suburban life near the sea will be more comfortable.

D．They want to have a sea farm to grow coral for their daughters.

2. What do we know about the Seaths from the text?

A．They often take other people's deeds for granted.

B．They have visited the Seychelles only once.

C．There are altogether six family members.

D．Barry Seath used to be a policeman.

3. What will Karolina and Barry Beath's coral farm be like?

A．It will be 1,300 meters long and 980 meters wide.

B．It will be the first of its kind in the Indian Ocean.

C．It will focus on fighting with rising sea temperatures.

D．It will be larger than the one on Australia's Great Barrier Reef.

4. What is Barry's long-term goal?

A．To show everyone they can make a difference to the sea environment.

B．To make sure no one is disappointed with the coral in the Seychelles.

C．To try to grow around 10,000 corals per year on their coral farm.

D．To show his daughters a better life of eco-friendly living.

3 . Why do we like drinking water from plastic bottles（塑料瓶）? Some people think it is healthy and clean. Others drink bottled water because it’s easy — you can carry it around with you. In hot countries, like Greece, we often buy bottles of cold water in the summer.

However, making lots of plastic is not a good idea for many reasons. First of all, we need a lot of oil for plastic products. We usually use oil as a source of energy. If we reduced the number of bottles we made, we wouldn’t need so much oil. Plastic bottles also pollute the environment. If we reused all our plastic bottles, we wouldn’t need so much space for rubbish dumps. But in Greece, we don’t reuse much of the plastic we use. In 2006, Greeks reused only about 10% of plastic waste. The rest became rubbish on land and in rivers and seas.

So next time you want to throw away a plastic bottle in the litter bin, stop and think. If you reuse it, you would help the environment. But what can you do when there isn’t a bin near you? Well, there are lots of useful ways that you can use your bottles again. For example, an empty bottle makes a great piggy bank for your pocket money, and if you cut a bottle in half, you will have a plant pot. Go green! You can make a difference.

1. What is not mentioned about bottled water in this passage?

A．It’s healthy.	B．It’s clean.
C．It’s easy.	D．It’s expensive.

2. Plastic products are made from ________.

A．energy	B．oil
C．rubbish	D．plants

3. Which is the best way to deal with used plastic bottles?

A．To reuse them.	B．To make a piggy bank.
C．To make a plant pot.	D．To drop them into the river.

4. The underlined part in this passage tells us “________”.

A．To make a different life, you’d better go outside.

B．To look different, you’d better wear green clothes.

C．To protect the environment, you can do something.

D．To go green, you should use plastic products.