—Correct ____ is important.
—I agree. I don’t eat sweets now, for I’m on a _____.
A．diet; dietB．food; foodC．diet; foodD．food; diet
D.
diet和 food 均可作“食物”解。但前者是抽象名詞，常作“飲食”而言，或指為特殊的需要而規(guī)定的食物，可構(gòu)成詞組be on a diet，意思為“節(jié)食”；food是一般用語，指具體的食物，凡是吃的，喝的都屬于food。它通常作不可數(shù)名詞，用單數(shù)，但在表示食物的種類時可用復(fù)數(shù)。
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