单选题 It is very important for a manager to keep employees ______ of what's going on in the business, both internally and externally.

(A) informing
(B) to inform
(C) informed
(D) informs

【正确答案】 C

【答案解析】[理由] 本句测试下列固定结构：
keep sb informed of 将……的情形随时告知某人
*以上结构中，keep表“将某人保持成……的状态”。informed为过去分词，视为形容词，作宾语补语，译成“被告知的”。
[例] Please keep me informed of any developments
(有任何发展请随时告知我。)
根据上述，空格内应置过去分词informed，故(C)应为正选。
inform有下列两种结构：
inform sb+that从句告知某人……
inform sb of sth告知某人某事
[例] A notice informed the guests that formal dress was required.
(通知上写宾客必须着正式的礼服。)
Please inform us of any change in our trip schedule.
(行程计划如有任何变动请通知我们。)