根据所给提示，完成句型转换。每空一词，含缩略词。

1. My father likes to watch basketball matches on TV. (改为否定句)

    My father _______ _______ to watch basketball matches on TV.

2. I collect toys because they are beautiful. (对划线部分提问)

    _______ _______ you collect toys?

3. Students can't take magazines out of the reading-room. (改为被动语态)

     Magazines can't _______ _______ out of the reading-room by students.

4. Mike is 14 years old. David is 12 years old. (合并为一句)

    Mike is 2 years _______ ________ David.

5. Alice didn't know how she could draw horses well. (改为同义句)

     Alice didn't know how ________ _______ horses well.

6. I wondered what I should do next. (改为同义句)

     I wondered what _______ ________ next.

污染不严重时，采用（）冲洗运转，可在其中加4%的冲洗添加剂，运转1～2h后，采样分析合格，再用工作油或同一粘度级的油，进行冲洗运转一次。

A.油

B.工作油

C.同粘度级的油

D.水