帮忙一下这一题单选题.

问题描述:

帮忙一下这一题单选题.
The Prime Minister walked onto the platform and seated herself in a chair,_____ to answer questions.
A.had prepared B.being prepared C.prepared D.preparing

prepare 常做及物动词.如prepare oneself for sth
所以这里用prepared for(语法上类似于doveted to)
选D