四、补全对话（本大题共5小题，每小题1分，共5分）
根据对话内容，从方框内选择恰当的句子，将对话补充完整（选项中有两项是多余的）。
A. The Best of Baseball.
B. How much did it cost?
C. When did you download it?
D. I'm going to the library later.
E. I was reading an e-book at that time.
F. Where did you get that e-book for free?
G. You have to return the book before next Monday.
A:Hi, Rob. I called you at 9 o'clock this morning, but you didn't answer.
B:Sorry, Ken. 41
A:What were you reading?
B:42
A:Oh! That's a good book. 43
B:Yesterday. It's really interesting.
A:44
B:Nothing. It was free!
A:What? 45
B:From the library!
A:Oh. I always forget. The library lends e-books now, too.
41. 42. 43. 44. 45.

41.E 42.A 43.C 44.B 45.F