I promised to keep them _________ of what would happen to me .A.know B.informing C.informed D.known
问题描述：
I promised to keep them _________ of what would happen to me .
A.know
B.informing
C.informed
D.known
答
选C
be informed of 被告知某事
keep them informed what happen to me 使他们即时获知我的情况
因为“them(他们)”是“be informed(被通知)”，表被动，因此用过去分词。
答
B
答
B.
意思上都可以的.不过有keep sb.doing sth.这个句型,所以选B!
答
C.