单一来源采购是（）的谈判采购方式，是指达到竞争性招标采购的金额标准，但在适当条件下采购部门向单一的供应商征求（）来采购。

A.一个供应商报价

B.单一供应商报价

C.没有竞争建议或报价

D.竞争不强建议或报价

The paper studies some ______ cases in which something somehow wrong leads to

the miscommunication, so that English teachers may improve their teaching. [ ]

A. distant

B. typical

C. exotic

D. misleading