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:

本题主要考查对句子结构的理解。根据句子中的walked onto…and seated himself…可知，句子表示几个动作的延续，应该用几个动词的并列答案选D。