Even though she        much, the woman multimillionaire insists on working as a street cleanser to set her children a good example.

A．doesn’t pay

B．isn’t paid

C．hasn’t paid

D．hasn’t been paid

采购合同不可以生成下列哪种单据？（）

A.采购申请单

B.采购订单

C.采购普通发票

D.付款单