(    ) 1. ---_________ do you exercise ?      ----- Every day.

        A. When     B. What      C. How long      D. How often

(    ) 2.There       a baseball match in a few days.

       A. will have  B. will be   C.is  D. has

(    ) 3. I don’t know when he      . When he       , I’ll let you know.

       A. returns; returns.               B. will return; returns.          

      C. returns; will return.            D. will return; will return.