第2部分：阅读判断(第16～22题，每题1分，共7分)
下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A;如果该句提供的是错误信息，请选择B;如果该句的信息文中没有提及，请选择C。
16. Thanks to the help of this sonic device， blind people can hear obstacles in the way speaking out their names.
A. Right
B. Wrong
C. Not mentioned
17. Dr. Smith hopes to make this device smaller so as to help the blind navigate unfamiliar places.
A. Right
B. Wrong
C. Not mentioned
18. Although this device will be useful， most of the blind may not afford it.
A. Right
B. Wrong
C. Not mentioned
19. According to Dr. Oberdor，this device can lead the blind people to the exact place he/she wants to go.
A. Right
B. Wrong
C. Not mentioned
20. The blind can hear better than ordinary people.
A. Right
B. Wrong
C. Not mentioned
21. Scientists intend to reduce the weight of this device to ten pound.
A. Right
B. Wrong
C. Not mentioned
22. Sensory psychophysics play a vital part in the invention of this device.
A. Right
B. Wrong
C. Not mentioned
