after leaving his post,he still kept himself( )of the world affairs by reading newspapers

题目

after leaving his post,he still kept himself( )of the world affairs by reading newspapers
1 o inform
2eing informed
3informed
4informing

答案

选3
keep oneself done of sth.
使自己了解情况
在他离职之后,他仍然通过看报纸了解世界事务