立法者将生活中已存在的某些零散的社会规范加以改造制作，使其条文化和系统化，整合为规范化的法律文本。该行为是（）
A. 法的认可
B. 法的修改
C. 法的制定
D. 法的补充
According to the passage, young people can pay less for their stay in the hostel if ______.
A. they share their food with each other
B. they can prove they have joined the hostel organization
C. they have brought enough equipment with them
D. they can prove that they are from a foreign country
( )是使投资项目的净现值等于零的贴现率。
A. 平均报酬率
B. 获利指数
C. 净现值
D. 内部报酬率
Which do you think might be the proper title for this passage
A. Youth Organization.
B. International Travel.
C. Education Out of School.
D. Summer Holidays.
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