6. What can we learn from Paragraph 1?
D
7. What did the scientists use sugar water for?
D
8. The interesting result of the test is that ______.
A
9. The underlined word “tricks” in the last paragraph is the closest in meaning to “______”.
B
10. Which is the best title for the passage?
C
答案：6. D 7. D 8. A 9. B 10. C
