To keep fit you should take more . Don’t be always busy doing your .A. exercise; exercise

问题补充：

To keep fit, you should take more . Don’t be always busy doing your .

A. exercise; exercise

B. exercises; exercises

C. exercises; exercise

D. exercise; exercises

答案：

A. exercise; exercise

B. exercises; exercises

C. exercises; exercise

(答案→)D. exercise; exercises

解析：本题考查名词。句中take exercise为“锻炼”之意；do one’s exercises做练习。句意：为了保持健康，你应当做更多的锻炼。不要总是忙于做你的练习。