下列动脉瘤中不属于真性动脉瘤的是：

A．蜿蜒状动脉瘤

B．舟状动脉瘤

C．夹壁动脉瘤

D．梭形动脉瘤

E．囊状动脉瘤

-Hurry up. The bus is coming.    

-Wait a moment. Don't cross the street ________ the traffic(交通) lights are green.[ ]

A. after

B. until    

C. while            

D. since