----- ______ do you play basketball?
-----Twice a week.
A.How many B.How long C.How often D.How much
As we know, __68__ . Food gives us energy, so __69__ . Of course, __70__ . We should eat more fruit and vegetables and less meat. A cup of milk and an egg a day can help make us strong. __71__ But if we eat too little or too much, or if we choose the wrong food, we may become sick. __72__ .
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从方框中所给的选项中选出能填入空白处的最佳选项,补全短文。(10分)
68.______ 69.______ 70.______ 71.______ 72.______