非巴比妥非苯二氮类()
巴比妥类()
苯二氮类()

A．阿普唑仑

B．水合氯醛

C．硫喷妥钠

D．奋乃静

E．哌替啶

John promised his doctor he()not smoke,and he has not smoked ever since.

A. might

B. should

C. could

D. would