_______ good for our health.

A. Do exercise is 　B. Doing exercise is C. Do exercises are D. Doing exercises are

_________morning_________ good for our health．

A．Do；exercise is             B．Do；exercises is 

C．Doing；exercises are         D．Doing；exercises is

---Doing sports ___ good for our health.

--- Yes, so I do morning _____ every day.

A．is, exercise                            B．is, exercises

C．are, exercise                           D．are, exercises

---Doing sports ___ good for our health.

--- Yes, so I do morning _____ every day.

A. is, exercise　　　　　　　　　 B. is, exercises　

C. are, exercise　　　　　　　　 D. are, exercises