囧哥做语法54
A Food and Drug Administration rule implemented in December 2000 mandates that any new drug that they intend to be used both by adults and children must undergo pediatric study and that its manufacturers list children's doses on the label.A drug that they intend to be used both by adults and children must
B drug whose intended use is for adults and children as well
C drug intended for use by both adults and children
D drug, if they intend that it be used by adults and also children, must
E drug, if intended for use both by adults and children, must
句子结构：
Rule mandates that any new drug定语从句must undergo...and that宾语从句
AE中both and不平行
B中将and 换成了as well不对
D中THEY没有指代对象，mandate和must 词义重复，both...and also搭配错误
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