People who drink and drive are ________ danger both to themselves and to others. They are in ________ danger of losing their lives.
A.the; the
B.a; a
C.a; /
D./; /
答案:C
考查冠词的用法。danger不可数名词,意为危险,可数名词时意为危险的人或事,短语:in danger of 处于什么样的危险中,句意:喝醉酒开车的人对他自己和其他人来说是一个危险人物,他们处于失去生命的危险中。故选C。