(     ) 26. ---- How often do you take exercise?

----             .

A. sometimes                              B. three hours              

C. at three o’clock                       D. in two hours

 (     ) 27. Eat a           diet to stay healthy.

A. balance                         B. balances                  

C. balanced                        D. to balance

(      ) 28.  ----            the matter?

---- He             a cold.

A. How’s, has                 B. What’s, has

C. How’s, have                D. What’s, have