Choosing what ______is no longer as easy as it once was, for people’s eating habits are changing,
A．eatB．to be eatenC．eatenD．to eat
D

試題分析：考查疑問詞+不定式的用法，疑問詞what+to eat是做choose的賓語，句意：選擇吃什么不再向從前那么容易了，因為人們的飲食習慣正在變化。選D。
點評：不定式有時可以與what, which, who, how, when, where等疑問詞連用，構(gòu)成不定式短語，在句中主要用作賓語，也可用作主語、表語。有時“疑問詞+不定式”可以轉(zhuǎn)換成相應(yīng)的從句。
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