Some problems are difficult to solve. But there are a lot of number expressions that can help. For example, if we put two and two together, we might come up with the right answer. We know that two heads are better than one. It is always better to work with another person to solve a problem. Some problems have only one solution. You cannot be of two minds over this. But with any luck,we can solve the problem in two shakes of a lamb’s tail. In other words,we could have our answers quickly and easily.

Sometimes we can kill two birds with one stone. That is, we can complete two goals with only one effort or action. But we must remember that two wrongs don’t make a right. If someone does something bad to you, you should not do the same to him.

If you are going out with your girlfriend,or boyfriend,but you don’t want another friend to go along on your date,you can just say to your friend: two’s company, three’s a crowd.

When I was a young child in school, I had to learn the three R’ s. These important skills are reading, writing and arithmetic. These three words do not all start with the letter “R”. But they have the sound of “R”. My teacher used to give three cheers when I did well in maths. They gave praise and approval for a job well done.

Some of my friends were confused and did not understand their school work. They were at sixes and sevens. In fact, they did not care if they finished high school. But they were happy when they completed their studies and graduated from high school. They were in seventh heaven. They were on cloud nine. Nine times out of ten students who do well in school find good jobs. Some work in an office doing the same things every day at nine-to-five jobs. You do not have to dress to the nines, or wear your best clothes, for this kind of work.

1.If you solve a problem without any difficulty, you can also say that you can do it .

A. in seventh heaven B. on cloud nine

C. at sixes and sevens D. in two shakes of a lamb’s tail

2.When Tom wins first place in the game,we can congratulate him by using “ ” according to the passage.

A. dress up to the nines

B. give three cheers

C. kill two birds with one stone

D. put two and two together

3.Which of the following has the similar meaning to “in all probability” ?

A. Two wrongs don’t make a right.

B. Two’s company, three’s a crowd.

C. Nine times out of ten.

D. Two heads are better than one.

4.What is the best title of the passage?

A. Interesting Number Expressions

B. The Importance of Numbers

C. Number Stories

D. Use Numbers

Two things I really believe in --- saving money and saving the planet, and it’s even better when I can do something that accomplishes both at the same time. Rainwater harvesting is just such a thing. In the near future, rainwater harvesting will be as common as twelve-year-old girls carrying cell phones.

Many countries already rely heavily on rainwater. Every building in these countries collects the rainwater from its roof and stores it for later use. However, America is just slightly slow to take action.

There are many ways to harvest rainwater and most of them are easy and inexpensive. For example, use rain barrels(桶)to collect the water that would run off your roof. You’d be surprised at how fast a fifty-gallon(加仑)barrel will be filled with free, usable water. New building construction offers some good ways to gather rainwater, and the cost of set-up is usually made up by reduced usage very quickly. Rainwater can be conveyed by roof pipes into underground containers, where a pump can draw water up as needed.

The rainwater can even be treated to make it drinkable. If that rainwater were not collected, but allowed to run over your lawn(草坪), into the street and eventually to a storm water treatment facility, it would pick up all sorts of pollutants on its journey --- chemical compositions and agricultural poisons from the grass, motor oil, waste water and such from the roads, and who knows what else. That is to say, the shorter distance it covers the more drinkable it will be.

Depending on where you live, the rainwater may be piped to a treatment plant or it may run in natural channels to allow nature to remove the pollutants. Either way, the treatment of rainwater is high priced. If you reduce the amount of rainwater run-off from your home or office, you reduce the need for treatment.

Water is rapidly becoming one of our most precious resources and it is not as abundant as you may think. In the year 2015, the United States used generally 479 billion gallons of fresh water per day.

1.According to the passage, harvesting rainwater can ______.

A.help us save money and be good for the environment

B.help us realize the importance of water

C.promote the development of economy and peace

D.make us live a better life in the near future

2.What could we learn from the first and the second Paragraph?

A.Little girls can save money by carrying cell phones.

B.Many countries can’t afford to harvest rainwater.

C.Harvesting rainwater in America is not that common.

D.Rainwater harvesting is mainly adopted by developed countries.

3.What is Paragraph 3 mainly about?

A.How to take advantage of rainwater.

B.How to fix the equipment under the ground.

C.How to reduce the cost of the equipment.

D.How to harvest rainwater.

4.What is the best time for people to harvest rainwater for drinking?

A.Before it is piped to a treatment plant.

B.After it runs over your lawn.

C.After it runs into the street.

D.Before it drops from the roof.

5.It can be inferred from the passage that ______.

A.it is easy to make rainwater drinkable

B.the author calls on people to harvest rainwater

C.many countries ignore to harvest rainwater

D.it is easy to deal with the pollutants from rainwater

For many years, machines have been doing work that people once did, including some difficult jobs. Search and rescue operations in dangerous environments are often seen as the first areas that will employ high technology robots. But there is another area where they may soon take jobs traditionally held by human beings: the restaurant industry.

Teams from around the world competed in early June at the DARPA Robotic Challenge Finals in California. A team from South Korea and its robot called DRC-Hubo,won the first place in the competition. The second and third place winners were from the United States. The robots were required to drive a vehicle, climb up steps and do mechanical work. Such ac­tivities are easy for humans to perform,but more difficult for machines. Not all of the com­petitors were successful. The failures showed how difficuit it is to design effective walking machines.

Akihiro Suzuki works at Yaskawa Electric,a company that develops robots. He says ro­bots cannot do everything a human can,but they are able to work without becoming tired. He says robots cannot taste food,change heating levels or seasonings to get the best flavor (风 味).But he says if a food can be easily prepared,a robot can repeat the same movement to re­produce the same meal.

One Japanese woman who saw the robots working wanted to bring them home. Masayo Mori says she would like to have a husband who could work like a robot. Suzumo Machinery showed its sushi (寿司)maker robot. It performs the often difficult work of wrapping the popular Japanese food. Hiroshi Monden is an official with the company. He says people all o­ver the world now eat sushi,but there are not enough skilled workers to prepare it. He says his machine can help anyone make sushi.

1.In Paragraph 1,the author tells us .

A.robots just do difficult jobs

B.robots are sometimes dangerous

C.robots are widely used in our life

D.robots are gradually replacing humans

2.Why did some teams fail at the DARPA Robotic Challenge Finals?

A.Their robots cannot be applied at home.

B.Preparing food is really difficult for robots.

C.Their robots can just repeat the same movement.

D.They failed to design effective walking robots.

3.We can infer from the last paragraph that .

A.Japanese men are lazy

B.robots are popular in Japan

C.Japan has advanced high technology

D.robots usually take the job of making sushi in Japan

4.In which column can we probably see the text?

A.Education. B. Culture. C. Health. D. Science.

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