【题目】The president promised to keep all the board members _____ of how the negotiations were going on．
A．inform B．informing
C．be informed D．informed
在线课程【答案】D
【解析】
试题分析：考查动词的-ed形式。状态性动词的-ed形式可以在句中作表语，此句keep someone informed就是表示使某人被告知。句意：总统承诺要让所有董事会成员了解谈判的进展， 故选D。