3. If 1,000 people dance at the same time, how many squares can be formed?
A. Only one big square,
B. 1,000 squares.
C. More than 100 squares.
D. Less than 100 squares.
答案：C 指导：计算题。由第二段可知，每一个square由八个人组成，由此可推知。
4. We can know from the passage that spuare-dancing _______.
A. is a nationwide custom of the US
B. varies from one place to another
C. is perforrmed only by people with colorful dresses
D. has changed Arrericans' dressing customs
答案：A 指导：短文第一段第一句可知。
