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

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

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

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

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

1. A.
   why
2. B.
   whether
3. C.
   when
4. D.
   what

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

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