问题
选择题
The professor walked onto the platform and seated himself in a chair,________ for answering questions.
A．had prepared
B．being prepared
C．preparing
D．prepared
答案
D
be prepared for="prepare" for为……作准备,故B、C、D三项从语法上都合题,但B、C项表动作,D项表状态。由题意知,此处须用过去分词作状语,表示伴随状态。
