25—29 DCCDC     30—34 ADCAC        35—39 ADACA    40 C
41—49 B, G, J, C, I, A, F, H, D
50—64 BCDBA   CDCBD   CDABD
65--67 CAD   68--71 ACBB    72--75 ADBB    76--80 FAEBD   
81. Lending their favorite books to their friends. / Lending a favourite read to a friend.
82. read the book you will email/ have emailed/emailed in /within two weeks
83. reading whole e-books for free by Wi-Fi.
84. The bookstores might be closed down.


25—29 DCCDC     30—34 ADCAC        35—39 ADACA    40 C
41—49 B, G, J, C, I, A, F, H, D
50—64 BCDBA   CDCBD   CDABD
65--67 CAD   68--71 ACBB    72--75 ADBB    76--80 FAEBD   
81. Lending their favorite books to their friends. / Lending a favourite read to a friend.
82. read the book you will email/ have emailed/emailed in /within two weeks
83. reading whole e-books for free by Wi-Fi.
84. The bookstores might be closed down.
Translation:
1. Nowadays, many people take vitamin C to protect themselves from colds. / Nowadays, many people protect themselves from colds by taking vitamin C.
2. Once the newly-built light rail is opened (to traffic), it will bring great convenience to the nearby residents. / The newly-built light rail, once opened, will bring great convenience to the nearby residents.
2. With the Expo approaching, many old houses have been pulled down and replaced by/with modern buildings.
4. A large number of books on the prevention and treatment of the H1N1 virus are said to have been published.
5. I find/have found (that) what matters is not how much/how many things you have done in one day, but how well you do those things (which/that) you have managed to complete/ how well you have dealt with what you have tried to/managed to finish.