A
D
c
keep sb doing sth 吧
选B
b)informing is correct
a)inform is not correct because it has to have a past tense(promised) or present tense(going)
c)be informed
there is already a linking verb,no need to add a "be" in front.
d)informed
not correct because "going on" is present,the process of inform has not yet end.
选D) informed 因为跟member是动宾关系。keep可以直接跟分词。
整个句子就是“总经理许诺，会让董事会的成员随时了解商谈的进展状况。”