We have two rooms ______, but I can’t decide ______.
A. to live, to choose which one B. lived, choose which one
C. to live in, which one to choose D. live, which one
C
【解析】本题的含义是我们有两个房间可以住,但我不知道选择哪一个,动词修饰名词room,若在名词之后,通常用动词不定式to do,通常名词也是后置定语的一个成分,room表示的是一个地点,故后置定语需加介词in表示方位,故本题选C。