With a lot of difficult problems ______, the young secretary felt like a cat on hot bricks.
A. settled B. to be settled C. being settled D. to settle
知识点：不定式
D
【知识拓展】
动词不定式做定语的知识. 1、动词不定式做定语,肯定是后置的；2、动词不定式做定语,该动词与被修饰的词之间,主要有几种关系：（1） 主谓关系：We must find a person to help us.(to help 的形式主语是a person）
（2）动宾关系：He has a lot of books to read.( to read 的形式宾语是books）（3）动状关系：Please give me a pen to write with.(pen 是to write的状语,此处往往需加介词）（4）无主谓、动宾、动状关系的：There‘s no need to send for a doctor.