I haven't decided which hotel _______.

问题描述:

I haven't decided which hotel _______.
A.to stay B.we would stay C.to stay at D.was to stay at 选哪一个啊?这种题末尾的介词什么时候省?什么时候不慎啊?

选 C to stay at
疑问词+to do sth ,构成动词不定式
如果作宾语就可省略 或 which是 副词就不需要介词