I have a letter _____ to tell the headmaster that we need a room _____.
A.to write; to live in
B.to be written; living in
C.to write; to live
D.written; to be lived in
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A解析不定式作后置定语,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.