Some people waste food，________other people haven’t got enough to eat.
A．whenB．untilC．sinceD．while
D
本題考查連詞。when 當(dāng)什么時(shí)候，until 直到，since 自從，while “而，但”，表示前后意義的轉(zhuǎn)折對比，句意：一些人浪費(fèi)食物，然而一些人沒有足夠的食物吃。所以選D。
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