____there is enough food in the world for everybody,not everyone can afford to buy it. （）____
问题描述：
____there is enough food in the world for everybody,not everyone can afford to buy it. （）____
A .While B .As C .Unless D .When
答
选择While,意思是尽管世上有足够的食物给每个人,但是不是每个人都有能力买得起.