_______ not to drive after drinking, some drivers are still trying their luck, which is really dangerous. [ ]

A. Being reminded  

B. To remind

C. Having reminded  

D. Reminded

目前，进出西藏的旅客以航空为主要交通选择的原因有

A．青藏高原地表起伏大，陆地交通线的建设难度大

B．地域广大、聚落稀疏、行程时间长、中途交通点少、行程不便

C．气候终年寒冷，风大，空气稀薄，行程不安全因素多

D．降低高原反应的影响