【题目】 A little battery puts out a little bit of electricity, so you can use it safely for your experiments. But the electricity that comes through the wires in your house or school is much more powerful. 【1】 .
Inside the walls where you live or study, there are big wires that carry electricity. When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. You have heard adults warn, “ 【2】，‘ Now do you know why? If you did, you would become part of the electrical path way.
【3】 The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot if you stuck your finger in the plug. Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. And that would hurt!
What if you held a piece of metal, like a fork or knife, and stuck it into the wall plug? Don't do it. Why? It's because metals also conduct electricity. 【4】
Don't touch any electrical appliance when you are wet. Can you think why? It's because water is a good conductor of electricity. When your hands are wet or when your body is in a bathtub full of water, the electricity could flow right through you and give you an awful shock, or even kill you.
Electricity is very useful, but it can be dangerous. 【5】If so, electricity can better serve you, instead of hurting you.
A.Life is precious!
B.So stay away from wires.
C.Be careful, be safe and be smart.
D.And you would get a terrible shock!
E.Don't stick your finger into the wall plug.
F.Therefore, keep in mind some safety rules.
G.Your body is a pretty good conductor of electricity.
在线课程【答案】
【1】F
【2】E
【3】G
【4】D
【5】C
【解析】
本文为一篇说明文。文章介绍了电在日常生活中会对人造成危害的几个情况及其原因。
【1】
结合前文A little battery puts out a little bit of electricity, so you can use it safely for your experiments. But the electricity that comes through the wires in your house or school is much more powerful. 一个小电池会放出一点点电，所以你可以安全地使用它来进行实验。但是通过家里或学校里的电线的电可能要强大得多。可知，家里的电路使用需要安全操作。F. Therefore, keep in mind some safety rules. 因此，请记住一些安全规则。符合此处语境。故选F项。
【2】
结合前文When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. 当你插上电灯、收音机或其他电器时，就是在把电灯或收音机插在电路上。及后文Now do you know why? If you did, you would become part of the electrical path way. 你知道为什么吗？如果你这样做了，你就会成为电路的一部分。可知，如果插入插座孔，就会成为电路的一部分。E. Don't stick your finger into the wall plug. 别把你的手指伸进墙上的插头。符合此处语境。故选E项。
【3】
结合后文Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. 把你的手指放在那里，可能是你，而不是灯泡，成为电路的一部分。G. Your body is a pretty good conductor of electricity. 你的身体是很好的导电体。符合此处描述，身体和灯泡一样都是很好的导电体。故选G项。
【4】
结合前文The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot电流通过电线传到墙上的插头，如果你把手指插在插头上会很疼。及前文It's because metals also conduct electricity. 因为金属也导电。可知，金属和人体一样也会导电，电击会使人感到疼痛。如果将叉子插入插座孔，人也会受到电击。.D. And you would get a terrible shock! 你会受到可怕的电击！故选D项。
【5】
结合后文If so, electricity can better serve you, instead of hurting you. 如果是这样的话，电可以更好地为你服务，而不是伤害你。C. Be careful, be safe and be smart. 小心，安全，聪明。提示安全用电的诀窍。故选C项。