People have realized that they should go on balanced diet and do exercise every day.A. a

问题补充：

People have realized that they should go on balanced diet and do exercise every day.

A. a; /

B. the; an

C. the; the

D. /; an

答案：

(答案→)A. a; /

B. the; an

C. the; the

D. /; an

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