问题补充：
We should keep ourselves of the latest development of science and technology.
A. informing
B. informed
C. to inform
D. inform
答案：
A. informing
(答案→)B. informed
C. to inform
D. inform
解析：句意：我们应该使自己与科技的最新发展跟上脚步。这里ourselves与inform使自己被告知科技的进步，也是就是了解科技的进步。keep oneself done，故选B。
