A、(1)
B、(2)
C、(3)
D、(4)

单项选择题A、 B、4 C、 D、0

单项选择题It was so quick and easy. A fourteen-year-old boy in Scottsdale, Arizona, put his 50 into 20 bill up to the light. If you do this, you can see the line has the words USA twenty . The line turns red if you put it under a special light. This line and the special paper with red and blue silk are not easy for home computers to copy. The government must try many different ways to stop faking. It needs to keep changing the way money is made because fakers can learn to copy the changes. Today copiers can't copy microprinted words or color-changing ink. But, in a few years, who knows? 8. You can be sure that the bill is faked when ________. A、you see microprinted words on the bill B、you see green ink from one direction and yellow from another on the bill C、you see a special line on the bill that runs from the top to the bottom and that has such words as USA hundred D、 you see normal ink on the bill