In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
A．howeverB．a(chǎn)lthoughC．a(chǎn)sD．while
D
考查連詞。However 然而，although 雖然，as 因為，while 當(dāng)什么時候，然而（表示對比）句意：在美國許多人浪費了很多食物，然而在非洲人們沒有足夠的吃的。故選D。
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