Mary__________my letter;otherwise she would have replied before now.

A．has received

B．ought to have received

C．couldn’t have received

D．shouldn’t have received

合伙人在农村淘宝网站上搜索需购买物品时，物品默认的排序方式是（）

A.销量

B.人气

C.价格

D.综合排序