— I’m on diet to lose weight.— You should take exercise as often as you can.A. \; \B. \;

问题补充：

— I’m on diet to lose weight.

— You should take exercise as often as you can.

A. \; \

B. \; a

C. a; \

D. a; a

答案：

A. \; \

B. \; a

(答案→)C. a; \

D. a; a

解析：试题分析：考查冠词的习惯用法。句意：-为了瘦身，我正在节食。-你应该尽可能经常地锻炼。不定冠词在固定短语中的用法：on a diet意为“节食”；零冠词在固定短语中的用法take exercise意为“锻炼”。