Their cheerful voice showed that they were doing ___ .

A．a thing exciting

B．something exciting

C．a thing excited

D．exciting something

担任安全敏感工作的人员，包括飞行机组人员、乘务员，不得使用或携带（）等禁用药物。

A.大麻、可卡因

B.鸦片、天使粉

C.安非他明

D.以上三项