As we were asleep, ＿＿ of us heard the sound .

A．both

B．none

C．all

D．any

撤药反应是生理依赖的表现，下列哪类药物不易引起撤药反应（）

A.阿片类

B.苯二氮草类

C.三环类抗抑郁药

D.羟甲戊二酰辅酶A还原酶抑制剂

E.β受体阻滞剂