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问题: 不定式选择

The woman is luckly enough to have many people _____ her with her work.(A)
A to help B helping C helped D help

How happy it is _____ with you?(D)
A works B worked C working D to work
麻烦逐项分析,谢谢

解答:

1. have sb/sth do/doing/done结构,have是使役动词.have sth/sb to do结构,have 是"有" 之意.从本句意,the woman不是"使",而是"拥有"很多人帮助她.所以选A.
2. 第二题是句型It is happy to do sth的变体:感叹happy,所以变成How happy it is to work with you.