义务教育投资要遵循的原则主要有

A．经济制约性原则

B．投资主体国家化原则

C．学生免费性原则

D．国家立法性原则

E．投资多元化原则

The woman proceeded gently to tickle that withered chin of seventy, much as it had been that of a four- or five-year old child.

A. much as if it was that

B. much as though it were that
C. much as though it has been that
D. much as though it had been that