句型转换，每空一词。

1．I used to play the guitar when I was in the primary school,                    ?

2．We speak English at school.(改为被动语态)

   English                        at school by us.

3．The story was very interesting. I could never forget it. (合并一句)

   The story was                                 I could never forget it.

4．Both my mother and my father like watching TV. (改为否定句)

           my mother         my father           watching TV.

5．Do you sweep the floor every day? (改为被动语态)

              the floor          every day?