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In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
A.howeverB.althoughC.asD.while
D
考查连词。However 然而,although 虽然,as 因为,while 当什么时候,然而(表示对比)句意:在美国许多人浪费了很多食物,然而在非洲人们没有足够的吃的。故选D。
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