The word “sharp” can be _1_ to describe many different things in your home, classroom, and places of work. In this chapter, the writer _2_sharp pencils, meaning pencils with a very fine _3_.The writer does not like dull pencils.

We can also use “sharp” to describe the blades of knives. Knives also have points. We can use “sharp” to describe a _4_ kind of point,_5_as the sharp points of kitchen and steak knives. Scissors have blades, too, and we can describe these blades as sharp or dull. Furthermore, the points of scissors are _6_ sharp or rounded _7_ on the kind of scissors. Some tools, such as saws, scrapers, and garden tools, also have blades. We can use the words “sharp” and “dull” to describe the blades of these tools, _8_.Sharp knives, scissors, and tools are_9_to use. They cut things easily and quickly, without effort.?

“Sharp” can be used to describe the edges of furniture and _10_some containers. For example, the edge of a table or desk can be _11_.In addition; we can describe the edge of _12_ open can as sharp. The top of a can is sometimes sharp_13_ to cut your hand. A piece of _14_ from a broken jar or bottle is_15_very sharp.

_16_we sometimes use “sharp” to describe people. A person who appears sharp is very well _17_.A person who is sharp, on the other hand, is intelligent, smart, and_18_ learn and understand.

To summaries, “sharp” can be used to describe many kinds of _19_ that have blades, points, and edges. When we used it to describe people, it can mean nice looking, well dressed, or intelligent. It is an expensive word _20_ it can be used in many different ways.?

1. A. written         B. used         C. seen           D. taken

2. A. talks about                       B. takes care of

  C. doesn't like to mention             D. makes up his mind to

3. A. sharp          B. color         C. point          D. edge

4.  A. some         B. any          C. only           D. certain

5. A. so           B. as soon         C. such           D. or

6. A. either        B. neither          C. too            D. very

7. A. working      B. which are       C. is             D. spending

8. A. too          B. even           C. either          D. ever

9. A. difficult      B. easy            C. interesting      D. clean

10. A. for         B. with            C. of             D. at

11. A. seen        B. sharp           C. smooth         D. hard

12. A. an          B. a              C. the             D.\

13. A. so as        B. in order        C. so that          D. enough

14. A. news        B. glass          C. information      D. advice

15. A. again        B. quite          C. rather           D. ordinarily

16. A. However     B. Finally        C. Therefore        D. In this way

17. A. prepared     B. dressed        C. mannered        D. served

18. A. easy to      B .is to           C. to              D. quick to

19 .A. funny things  B. knives         C. objects          D. containers

20. A. because      B. even if        C. though          D. not only

You can be proud of yourselves, even if you can only make one or two of these green changes. The goal here is to limit carbon dioxide and other greenhouse gases, which are closely associated to the big problem of global-warming.
Strategy 1: Bring your own cup to Starbucks
You’ll get a 10 cent discount, and it’s one less paper cup to end up in a landfill. While you’re there, pick up some free bags of spent coffee grounds to use as ‘‘green’’ fertilizer in your garden.
The payoff: The store won’t create more waste when they throw away a cup.
Strategy2: Turn off your computer
When in standby mode, your PC is still using energy. In fact, 75percent of electricity used in your home comes from electronics that are turned off.
The payoff: Turning off a monitor for 40 hours a week may only save $5 a month, but it reduces CO2 by 750 pounds
Strategy 3: Reuse plastic bags
Instead of throwing away 100 billion plastic bags a year, try and get a second, third, or tenth use out of them. Better yet, next time you shop, try a reusable bag.
The payoff: You’re reducing pollution. The amount of oil it would take to make just 14 plastic bags would run your car for one mile.
Strategy4: Use recycled paper in the bathroom
Most of the toilet paper we use is made from trees found in forests previously untouched by humans.
The payoff: If every household replaced one roll of toilet paper with a recycled one, 424000 trees would still be standing. Look for eco-paper towels too.
Strategy5: Buy energy-efficient appliances（电器）
Replace the old fridge with an Energy Star appliance and you’ll use 15 percent less energy. It might be a little expensive to buy, but you’ll save money on your electricity bills and help the environment.
The payoff: If we all used one Energy Star appliance at home, it would be like planting 1. 7 million acres of new trees.
Strategy 6: Plant a tree
Adding green to your garden is beautiful and earth-pleasing.
The payoff: Just one tree will help make cleaner air and save the environment from 5000 pounds of hot carbon dioxide each year.
54. What is the best title for the passage?
A. Ways to save money at home
B. Ways to be earth-friendly
C. Ways to end global-warming
D. Ways to limit carbon dioxide
55. What benefits do these strategies have in common?
A. They all help reduce the use of energy like electricity.
B. They all cut down the amount of the paper.
C. They all result in producing less greenhouse gases.
D. They all help to preserve our trees and forest.
56．Which strategies suggest recycling or reuse of things?
A．Strategies 1&3    B．Strategies 2&5 
C．Strategies 3&6    D．Strategies 4&5.

You can be proud of yourselves, even if you can only make one or two of these green changes. The goal here is to limit carbon dioxide and other greenhouse gases, which are closely associated to the big problem of global-warming.

Strategy 1: Bring your own cup to Starbucks

You’ll get a 10 cent discount, and it’s one less paper cup to end up in a landfill. While you’re there, pick up some free bags of spent coffee grounds to use as ‘‘green’’ fertilizer in your garden.

The payoff: The store won’t create more waste when they throw away a cup.

Strategy2: Turn off your computer

When in standby mode, your PC is still using energy. In fact, 75percent of electricity used in your home comes from electronics that are turned off.

The payoff: Turning off a monitor for 40 hours a week may only save $5 a month, but it reduces CO2 by 750 pounds

Strategy 3: Reuse plastic bags

Instead of throwing away 100 billion plastic bags a year, try and get a second, third, or tenth use out of them. Better yet, next time you shop, try a reusable bag.

The payoff: You’re reducing pollution. The amount of oil it would take to make just 14 plastic bags would run your car for one mile.

Strategy4: Use recycled paper in the bathroom

Most of the toilet paper we use is made from trees found in forests previously untouched by humans.

The payoff: If every household replaced one roll of toilet paper with a recycled one, 424000 trees would still be standing. Look for eco-paper towels too.

Strategy5: Buy energy-efficient appliances（电器）

Replace the old fridge with an Energy Star appliance and you’ll use 15 percent less energy. It might be a little expensive to buy, but you’ll save money on your electricity bills and help the environment.

The payoff: If we all used one Energy Star appliance at home, it would be like planting 1. 7 million acres of new trees.

Strategy 6: Plant a tree

Adding green to your garden is beautiful and earth-pleasing.

The payoff: Just one tree will help make cleaner air and save the environment from 5000 pounds of hot carbon dioxide each year.

54. What is the best title for the passage?

A. Ways to save money at home

B. Ways to be earth-friendly

C. Ways to end global-warming

D. Ways to limit carbon dioxide

55. What benefits do these strategies have in common?

A. They all help reduce the use of energy like electricity.

B. They all cut down the amount of the paper.

C. They all result in producing less greenhouse gases.

D. They all help to preserve our trees and forest.

56．Which strategies suggest recycling or reuse of things?

A．Strategies 1&3    B．Strategies 2&5  

C．Strategies 3&6    D．Strategies 4&5.

You can be proud of yourselves, even if you can only make one or two of these green changes. The goal here is to limit carbon dioxide and other greenhouse gases, which are closely associated to the big problem of global-warming.

Strategy 1: Bring your own cup to Starbucks

You’ll get a 10 cent discount, and it’s one less paper cup to end up in a landfill. While you’re there, pick up some free bags of spent coffee grounds to use as ‘‘green’’ fertilizer in your garden.

The payoff: The store won’t create more waste when they throw away a cup.

Strategy2: Turn off your computer

When in standby mode, your PC is still using energy. In fact, 75percent of electricity used in your home comes from electronics that are turned off.

The payoff: Turning off a monitor for 40 hours a week may only save $5 a month, but it reduces CO2 by 750 pounds

Strategy 3: Reuse plastic bags

Instead of throwing away 100 billion plastic bags a year, try and get a second, third, or tenth use out of them. Better yet, next time you shop, try a reusable bag.

The payoff: You’re reducing pollution. The amount of oil it would take to make just 14 plastic bags would run your car for one mile.

Strategy4: Use recycled paper in the bathroom

Most of the toilet paper we use is made from trees found in forests previously untouched by humans.

The payoff: If every household replaced one roll of toilet paper with a recycled one, 424000 trees would still be standing. Look for eco-paper towels too.

Strategy5: Buy energy-efficient appliances（电器）

Replace the old fridge with an Energy Star appliance and you’ll use 15 percent less energy. It might be a little expensive to buy, but you’ll save money on your electricity bills and help the environment.

The payoff: If we all used one Energy Star appliance at home, it would be like planting 1. 7 million acres of new trees.

Strategy 6: Plant a tree

Adding green to your garden is beautiful and earth-pleasing.

The payoff: Just one tree will help make cleaner air and save the environment from 5000 pounds of hot carbon dioxide each year.

54. What is the best title for the passage?

A. Ways to save money at home

B. Ways to be earth-friendly

C. Ways to end global-warming

D. Ways to limit carbon dioxide

55. What benefits do these strategies have in common?

A. They all help reduce the use of energy like electricity.

B. They all cut down the amount of the paper.

C. They all result in producing less greenhouse gases.

D. They all help to preserve our trees and forest.

56．Which strategies suggest recycling or reuse of things?

A．Strategies 1&3    B．Strategies 2&5 

C．Strategies 3&6    D．Strategies 4&5.

       You can be proud of yourselves, even if you can only make one or two of these green changes. The goal here is to limit carbon dioxide and other greenhouse gases, which are closely associated to the big problem of global-warming.

Strategy 1: Bring your own cup to Starbucks

       You’ll get a 10 cent discount, and it’s one less paper cup to end up in a landfill. While you’re there, pick up some free bags of spent coffee grounds to use as ‘green’fertilizer in your garden.

    The payoff: The store won’t create more waste when they throw away a cup.

Strategy2: Turn off your computer

       When in standby mode, your PC is still using energy. In fact, 75percent of electricity used in your home comes from electronics that are turned off.

       The payoff: Turning off a monitor for 40 hours a week may only save $5 a month, but it reduces CO2 by 750 pounds

Strategy 3: Reuse plastic bags

       Instead of throwing away 100 billion plastic bags a year, try and get a second, third, or tenth use out of them. Better yet, next time you shop, try a reusable bag.

       The payoff: You’re reducing pollution. The amount of oil it would take to make just 14 plastic bags would run your car for one mile.

Strategy4: Use recycled paper in the bathroom

     Most of the toilet paper we use is made from trees found in forests previously untouched by humans.

The payoff: If every household replaced one roll of toilet paper with a recycled one, 424000 trees would still be standing. Look for eco paper towels too.

Strategy5: Buy energy-efficient appliances(电器) 

       Replace the old fridge with an Energy Star appliance and you’ll use 15 percent less energy. It might be a little expensive to buy, but you’ll save money on your electricity bills and help the environment.

       The payoff: If we all used one Energy Star appliance at home, it would be like planting 1.7 million acres of new trees.

Strategy 6: Plant a tree

       Adding green to your garden is beautiful and earth-pleasing.

       The payoff: Just one tree will help make cleaner air and save the environment from 5000 pounds of hot carbon dioxide each year.

53．What is the best title for the passage?

       A．Ways to save money at home

       B．Ways to be earth-friendly

       C．Ways to end global-warming

       D．Ways to limit carbon dioxide

54．According to the writer, what will happen if our PC is switched off when not in use?

       A．It will help to save a large amount of money.

       B．It will help to reduce a great deal of CO2.

       C．It will save the amount of oil that runs your car for a mile

       D．It will be like planting 1.7 million acres of new trees.

55．Which strategies suggest recycling or reuse of things?

       A．Strategies 1&3                                B．Strategies 2&5

       C．Strategies 3&6                                D．Strategies 4&5.

56．What benefits do these strategies have in common?

       A．They all help reduce the use of energy like electricity.

       B．They all cut down the amount of the paper.

       C．They all result in producing less greenhouse gases.

       D．They all help to preserve our trees and forest.