3. Passive RFID tags chiefly consist of ______.

A. scanning devices　　　　　　　 B. radio waves　 C. batteries　　　　　　　 D. chips

2. We know from the passage that with the help of RFID tags, people_______.

A. will have no trouble getting data about others

B. will have more energy for conversation

C. will have more time to make friends　

D. won’t feel shy at parties any longer

1. The article is intended to_______ .　

A. warn people of the possible risks in adopting RFID technology

B. explain the benefits brought about by RFID technology

C. convince people of the uses of RFID technology

D. predict the applications of RFID technology

4.词义猜测类

联系语境，利用上文提供的解释或说明猜测词义。一个单词在不同的语境中有不同的意思，只有在一定的语言环境中，才能确定出词汇或语句的意义。

39. Bras Basah Road is named _______.

A. after a person

B. after a place

C. after an activity

D. by its shape

[解析]C细节理解题。 见第四自然段前两行。