题目

Though ____ the dangers of smoking to their health, smokers still find it hard to give up smoking. A . aware B . aware of C . are aware of D . be aware of 答案：B（2016春•淮阴区期中）处于该“十字路口”上的最重要的通道是（　　）A．马六甲海峡B．巴拿马运河C．台湾海峡D．苏伊士运河