日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a medical examination．

         A．why            B．what          C．when         D．whether

If you feel tired and sick of fat foods, that is _______ you have to go to the hospital for a medical examination.

 A．why          B．what         C．when         D．whether

If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a medical examination．

       A．why               B．what               C．when              D．whether

If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a medical examination.

A. why         B. what        C. when        D. whether

 If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a medical examination．

       A．why                   B．what                  C．when                 D．whether