3.What is NOT true of the invisibility device？
A It is made of a special material with unusual ability.
B Microwaves bounce off it when they strike it.
C Microwaves pass through it when they strike it.
D It bends the microwaves all the way around until they reach the opposite side.
4.What does the word “coaster” mean in the passage？
A A disk or plate placed under a drinking glass to protect a table top.
B A vessel engaged in coastal trade.
C A roller coaster.
D A resident of a coastal area.
5.Harry Potter‘s invisibility cloak doesn’t have any real competition yet，because
A scientists have not found out how his cloak works.
B the cloaking device is a total failure.
C the cloaking device works only for microwaves.
D the cloaking device works only for visible light.
答案与题解：
1.C文章的第一段告诉我们，科学家还没有发明哈里。波特使用的那种隐身衣，所以不能选 A;该段还告诉我们，科学家已制造了，一种装置，这种装置能使自身或置于其中的物体不被微波发现，所以C是正确选择，也就是说，科学家发明的隐形装置和哈里波特的隐身衣仅仅在概念上相同，这同时说明B和D是错误的选择。
2.B第三段最后一句中告诉我们，A是错误选择，B是正确选择。该段第三句说，微波与可见光一样都是一种辐射能，所以C的说法是错误的，不能选择；根据该段第一句：with wavesof light that the human eye can see和第三句：Like visible light，可以得知D是错误的说法，也不能选择。
3.B第四段第三句说，当微波到达装置表面时，very few bounce off.very few是几乎没有的意思，所以选择B.其他选择所述内容都可以很容易在该段中找到。
4.A第四段第一句告诉我们，科学家的这个隐形装置和一个杯垫差不多大小，所以A是正确选择。coaster是一个多义词，其他几个选择是该词的其他意思，B：从事沿海贸易的船；C：过山车，摩天轮；D：海岸地区居民。
5.CA句在短文中没有提到；按文章的内容B不是正确的说法；文章最后一段说，And thedevice works only for microwaves，not forvisible light，所以C是正确选择。