I hope you will keep us of how you are getting on with the work.A. informB. informingC. to

问题补充：

I hope you will keep us of how you are getting on with the work.

A. inform

B. informing

C. to inform

D. informed

答案：

A. inform

B. informing

C. to inform

(答案→)D. informed

解析：考查过去分词作宾补。短语：keep sb informed of sth 使某人了解某事，句意：我希望你要使我们了解你的工作进展的如何。所以选D。