(2013·亳州模拟)　　　difficult and challenging the task may be, we must finish it on time, because there is a possibility　　　we’ll be fired if we can’t fulfill the task on time.

A．Whatever; that

B．However; that

C．Whatever; which

D．However; as

口唇呈樱桃红色见于（）。

A.一氧化碳中毒

B.心功能不全

C.肺功能不全

D.高铁血红蛋白血症

E.急性发热性疾病