The principal walked onto the platform and seated himself in a chair, ______ for answering questions.
A.preparedB.being preparedC.preparedD.preparing在线课程C
解析：
试题
分析：此处prepared相当于形容词，意为：准备好了的。这里形容词短语作伴随状语。故选C。句意：校长走上讲台，坐下，准备回答问题。考点：考查非谓语动词的用法。