--- Look, Mr Green is on the other side of the street.

--- It _____ be him.He has gone to London on business.

A．must

B．might not

C．can’t

D．mustn’t

癫痫大发作或精神运动性发作的首选药是：

A．乙琥胺

B．苯巴比妥钠

C．苯二氮卓类

D．卡马西平

E．丙戊酸钠