句型转换。
（1）We are having lunch at home .(改为一般疑问句，并做肯定回答)
   you having lunch at home ?Yes ,                         .
（2）Jack is flying the kite now .(对画线部分提问)
         Jack          now ?
（3）He goes to work at 7:00.(改为一般疑问句，并做否定回答)
   he         to work at 7:00?No,he             .
（4）I have lunch at 12:00 noon. (对画线部分提问)
           you              lunch ?