—______is my book.______  isn't my book.

—             her book.[ ]

A. This; This; That's    

B. This; That; That's

C. That; This; That's    

D. That; That; This's

框架协议采购招标商务评审采用基准价得分法的，要求进入商务评审的有效投标人数量不应少于（）家。

A.3

B.4

C.5

D.6