3.What is NOT true of the invisibility device？
AIt is made of a special material with unusual ability.
BMicrowaves bounce off it when they strike it.
CMicrowaves pass through it when they strike it.
DIt bends the microwaves all the way around until they reach the opposite
side.
4.What does the word “coaster” mean in the passage？
AA disk or plate placed under a drinking glass to protect a table top.
BA vessel engaged in coastal trade.
CA roller coaster.
DA resident of a coastal area.
5.Harry Potter‘s invisibility cloak doesn’t have any real competition yet，
because
Ascientists have not found out how his cloak works.
Bthe cloaking device is a total failure.
Cthe cloaking device works only for microwaves.
Dthe 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。