1. According to the first three paragraphs, _____.
A. the self-cleaning clothes are easily worn out
B. the clothes will be covered with silver and copper after self-cleaning
C. people can use the self-cleaning clothes on rainy days
D. the nanostructures can break down dirt and marks on clothes

2. What does the underlined word “solution” in Paragraph 3 mean?
A. 方案          B. 溶液           C. 水盆              D. 模型

3. What do Paragraphs 4 & 5 talk about?
A. How the self-cleaning clothes are made.       

B. How the self-cleaning clothes work.
C. What advantages the self-cleaning clothes have.

D. What helps the self-cleaning clothes work.

4. From the passage, we learn that _____.
A. it’s time to throw out our washing machines         B. the solution sells well
C. clothing makers like the solution                  D. the solution is not on sale yet

5. We might read the above passage in ________.

A. a fashion book                 B. a guide book 

C. a science magazine              D. a newspaper advertisement.

参考答案1—5、DBCDC