The professor walked onto the platform and seated himself in a chair, for answer

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?

试题答案

D?

解析:

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。