( ) 5. At first, Alex thinks he can't play the piano because ______.
A
( ) 6. What does the underlined word “impossible” in paragraph 2 mean?
B
( ) 7. What can we know from paragraph 3?
C
( ) 8. Alex shows his thanks to ______.
A
( ) 9. The passage mainly talks about ______.
D
答案：5. A；6. B；7. C；8. A；9. D。
