英语诊断，请你给下面的句子诊病吧！

1. Yesterday I buyed presents. 

    改：                                             

2. Did you went skiing ? 

    改：                                             

3. Tomorrow I'll back home.  

    改：                                              

4. What did you usually do on Sunday ?  

    改：                                              

5. Yesterday I skiied.

    改：                                              

_____ read newspapers for pleasure, but also to improve their minds. [ ]

A. Not only old men

B. Not only old men do

C. Not only do old men

D. Old men not only do