分类：教育/科学-外语学习
问题：一道英语选择题_______inthenewadvertisin 
_______in the new advertising regulatn that food companies list the amounts of vitamin A and C.A What requires    B What is required     C It's required   D It requires请说明理由
回答：C.  为 It's ...... that 的强调句．看这种句子时，可去掉It's ...... that ，这句句子变为　　In the new advertising regulation  food companies list the amounts of vitamin A and C.　　意思就显而易见了．