Betty King was born in Quincy．It's a famous town in America because two presidents in history{#blank#}1{#/blank#}born there．There were a lot of things to do in Quincy,so she was happy{#blank#}2{#/blank#}there and she wasn't bored because many{#blank#}3{#/blank#} there were her friends．She was there for the last time in 2010．One day she will{#blank#}4{#/blank#}back to Quincy and she is looking forward to{#blank#}5{#/blank#}her friends again．

A: This is something I've never seen. What is it used for?

B: It's used for {#blank#}1{#/blank#} water. It helps my family use only half as much water as we used to.

A: Wow, that's great! Where can I buy one?

B: You can't get one {#blank#}2{#/blank#}. Because my father invented it {#blank#}3{#/blank#}.

A: Really? Your father must be very creative then.

B: Yes. And he believes that water is important. He says we should do something to save water. How do you save water?

A: Well, I save water {#blank#}4{#/blank#} using shower water to clean the toilet.

B: That {#blank#}5{#/blank#} good. I think I'll do the same thing as you later.

    Free energy is everywhere around us. There are many ways to make and collect energy from{#blank#}1{#/blank#}sources(来源) like sun, wind, water, etc. But people always make things difficult by not using these sources of energy. In the last few years there have been a great number of new ideas for generating(产生) energy. People suddenly realized that everyday things can be a source of energy, such as riding a bike, running or just{#blank#}2{#/blank#}, etc. But, is there anything else that can be used for collecting energy? We{#blank#}3{#/blank#}have to change our way of thinking if we want to change the world.

    So comes the idea of solar( 太阳能) roadways. Are they the road of future? Why don't we use them for collecting energy?

    The US Department of Transportation{#blank#}4{#/blank#}$100,000 to Solar Roadways to build the first ever Solar Road.