We had no one us for we could deal with the case all by ourselves.A. help B. to help C.

问题补充：

We had no one us, for we could deal with the case all by ourselves.

A. help B. to help C. helped D, helps

答案：

解析：句意：我们没有让别人帮助我们，因为我们可以自己解决问题。这里使用了“have sb do sth”,这个结构，用省略to的不定式做宾语补足语，故选A。