A: Lily, I heard that a high building on Xihuan Road was on fire yesterday.

B: How could it happen?

A:It's said that the owner of a flat put a piece of metal（金属）in the microwave and it caused fire.

B: Didn't he know it was dangerous?

A: Maybe he was an old man and

B: Well, perhaps you are right. Sometimes I think electricity is very dangerous.

A: It brings lots of convenience to us.

B: I think it's important to teach people how to use it in a right way.

A: Well,

    Electricity is becoming more and more important. It 1 our life every day. Without it, we can2 live. Do you know who discovered electricity? Yes, he is Benjamin Franklin. When he 3 a kite in the storm, something from the 4 gave him a fright(惊吓). What could it be? It was5! Why is electricity becoming so 6 in our life? It's because people 7 many different electrical appliances in almost all 8, such as washing machines, light bulbs, 9, air conditioners, printers and televisions. Although electricity is very important, it is very dangerous. So when using electricity we should be 10.

    Angelo Casimiro made something new at the age of fifteen.

    Casimiro made a device(装置）. It can charge（给……充电）your cellphone as you walk! When you run, jump or walk, a pair of discs(唱片）inside the shoes can produce electricity. It can be used to charge your phone or any other devices with a USB port!

    People have to move a lot if they use the device to charge. Those who like travelling in the wild will love it. It takes about eight hours' jogging to charge a lithium-ion（锂离子）battery and two hours' playing basketball will only give the cellphone about 10 minutes' charge.

    A device called SolePower is a kind of insole（鞋垫）that can produce electricity. SolePower is like Casimiro's device, but it can fully charge a cellphone after over a four-kilometre walk. So there's a lot for Casimiro to do to make his invention（发明）better.

    Anyway, Casimiro's device is quite good. After all, his invention started something new, right?