Question

I have a letter _____ to tell the headmaster that we need a room _____.

1. A.
   to write; to live in
2. B.
   to be written; living in
3. C.
   to write; to live
4. D.
   written; to be lived in

Answer 1

A
不定式作后置定语，与所修饰的词有动宾关系，又与句中其他名词或代词有主谓关系，这时候不定式的主动表示被动意义，不定式动词不及物时要加上相应的介词，如：He is a pleasant person to work with.