单选题:The rule that only people above 21 years of age can drink___

题目内容:
The rule that only people above 21 years of age can drink__________. A.is a new law promoted by the twenty states
B.had been once adopted before the 1960s
C.has been enforced since the prohibition of alcohol
D.will be carried out all over the country

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答案解析:

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Operations which left patients __________and in need of long

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