Question

    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 say, “Don’t stick your finger into the wall plug.” Now do you know why?2.Your body is a pretty good conductor of electricity. 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.

Think: Why should you never put your fingers into the socket（插座）where the light bulb is fixed into a lamp？3.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 conduct electricity. And you would get a terrible shock！

4.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. Be careful, be safe and be smart.5..

A.Let electricity help you, not hurt you.

B.Keep yourself away from the electricity.

C.Therefore, you need to remember some safety rules.

D.Don’t touch any electrical appliance when you are wet.

E.Make your home as safe as possible for kids with these tips.

F.If you did, you would become part of the electrical path way.

G.That’s the place where the electricity flows into the light bulb.

Answer

1.C

2.F

3.G

4.D

5.A

【解析】

这是一篇选句填空。文章主要讲述电在日常生活中会对人造成危害的几个情况及其原因。

1.由前一句中的But可知，“the electricity that comes through the wires in your house or school is much more powerful.”以及空格所表达的内容，和第一句“A little battery puts out a little bit of electricity, so you can use it safely for your experiments.”是对比关系。第一句“A little battery puts out a little bit of electricity, so you can use it safely for your experiments.”表达的是“一个小电池可以产生一点点的电，所以你可以在你的实验上安全地使用它”，由此可知，空格处应该是在表达一种安全用电。选项C中的Therefore和第一句中的so相呼应，选项C中的“you need to remember some safety rules.”表达的是“你需要记住一些安全规则”和第一句中的“你可以在你的实验上安全地使用它”都是在表达安全用电。故选C。

2.由第二段第三句“You have heard adults say, “Don’t stick your finger into the wall plug.””，第四句“Now do you know why?”以及空格后一句“Your body is a pretty good conductor of electricity.”可知，你听说过成年人这么说，“不要将你的手指插入到墙上的插座”，现在你知道为什么了吗？你的身体是电的非常好的导体。选项F中“If you did”表达的是“如果你这么做了”，是对第二段的第三句中“不要将你的手指插入到墙上的插座”的承接，选项F中的“you would become part of the electrical path way.”表达的是“你将成为电路的一部分”，是对后一句“你的身体是电的非常好的导体。”的启下。故选F。

3.由前一句“Think: Why should you never put your fingers into the socket（插座）where the light bulb is fixed into a lamp？”可知，思考：为什么你绝对不可以将你的手指放到电灯泡和灯固定在一起的插座。选项G“That’s the place where the electricity flows into the light bulb.”表达的是“那是电流向电灯泡的地方”，选项G中的代词That是对前一句中的the socket的指代，选项G中的“the place where the electricity flows into the light bulb”是对前一句中的“the socket（插座）where the light bulb is fixed into a lamp”进一步说明。故选G。

4.由后两句“Can you think why？It’s because water is a good conductor of electricity.”可知，你能想到为什么吗？这是因为水是电的良好导体。由此可知，空格处应该是在表达和水有关的内容。选项D“Don’t touch any electrical appliance when you are wet.”表达的是“当你是湿的时候，不要触碰任何电器”，和后两句的“这是因为水是电的良好导体”相呼应。故选D。

5.由最后一段第一句“Electricity is very useful, but it can be dangerous.”可知，电是非常有用的，但是它可能是危险的。选项A“Let electricity help you, not hurt you.”表达的是“让电帮助你，而不是伤害你”，选项A中的“让电帮助你”和最后一段第一句中的“电是非常有用的”相呼应，选项A中的“而不是伤害你”和最后一段第一句中的“但是它可能是危险的”相呼应。故选A。