(Ⅱ)录音中有一篇短文，听两遍后，选择最佳答案。(5分)
6. Which does the writer think is the most useful invention?
A. The computer. B. The television.
C. The bike.
7. Who was Thomas Edison?
A. A great American teacher.
B. A great American inventor.
C. A great English inventor.
