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―Correct ____ is important.

―I agree. I don’t eat sweets now, for I’m on a _____.

A. diet; diet      B. food; food             C. diet; food             D. food; diet

 

D.

解析:diet和 food 均可作“食物”解。但前者是抽象名词, 常作“饮食”而言, 或指为特殊的需要而规定的食物,可构成词组be on a diet, 意思为“节食”;food是一般用语,指具体的食物,凡是吃的,喝的都属于food。它通常作不可数名词,用单数,但在表示食物的种类时可用复数。

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