31
 
C
- Dẫn chứng : One day John's father bought a computer for him . He thought it was a good replacement for John's typerwriter , which had been broken down

32
 
B
- Dẫn chứng : He didn't expect that John would spend all his time playing computer games on it , which was what he did

33
 
D
- Dẫn chứng : John could use the computer to write essays . He didn't expect that John would spend all his time playing computer games on it , which was what he did 

- Xét câu trước ta thấy có "the computer" và vế sau "it" theo nghĩa thì John có thể chơi game trên nó (nó ở đây hiểu theo nghĩa là cái máy tính)

34
 
A
- Dẫn chứng : When that happened , John realized that he had made a terrible mistake . Now , he uses the computer mainly for typing his essays

35
 
B
- Dẫn chứng : One day John's father bought a computer for him . He thought it was a good replacement for John's typerwriter , which had been broken down.He didn't expect that John would spend all his time playing computer games on it , which was what he did