练习：
1.To make a living，the Huichol create artwork and
A.sell it to tourists in their villages.
B.sell it in cities far away from their villages.
C.display it in their village museum.
D.keep it in their homes to attract tourists.
2.Why Can Portable Lights emit light?
A.Electronic crystals are woven into fabrics.
B.Items such as clothes and bags are used to carry lights.
C.The sun’s energy is collected during the day.
D.All of the above.
3.What does Sheila Kennedy say about Portable Lights?
A.This invention Can change the lives of people，both rich and poor.
B.They are widely used in the United States.
C.Portable Lights can help poor people around the world to get light.
D.They are expensive to make but easy to carry.
4.What is the most important part of the Portable Light technology?
A.HB LEDs
B.Glass Bulbs.
C.Incandescent lights.
D.Heated metal coils.
5.LEDs are different from light bulbs in that
A.LEDs ale incandescent lights while light bulbs are not.
B.LEDs have a metal coil while light bulbs have not.
C.LEDs emit colored light while most fight bulbs don’t.
D.LEDs are made up of tiny pieces of rock while light bulbs are not.
答案与题解：
1.B短文的第一段提供了答案，该段告诉我们，维克人为了谋生，制作工艺品，并到几百英里以外的城市去销售。
2.D文章的第二和第三段包括了A、B和C所述内容。所以D是答案。
3.C短文的第四和第五段提供了答案。短文第四段的句子说了Potable Lights可以在世界范围内改变穷乡僻壤用不上电的人们的生活，C准确地表达了这层意思，所以是答案。A不是答案，说Potable Lights能改变富人穷人的生活，不符合原文的意思。短文没有提及Portable Lights在美国使用，也没有说Portable Lights是否花费很大。所以B和D都不是答案。
4.A 第六段的第一句提供了答案。Portable Lights技术的最主要部分是high-brightness light-emitting diodes，即高亮度发光二极管。
5.C短文的第六段对light bulbs进行了描述。第二句中的those glass bulbs即指第一句中的light bulbs.因此，LEDs不是incandescent lights(白炽灯)，也没有金属丝。所以A和B均是错误的选择。最后一段的第一个句子LEDs，on the other hand，are like tiny pieces of rock
made up of molecules that are arranged in a crystal structure中的like pieces of rock，不等于pieces of rock，所以，D也是错误选择。根据短文的最后一段内容，C是正确选择。