with some research materials, he decided on three possible approaches in his experiment.A

发布时间：2020-08-17 07:27:54

     with some research materials, he decided on three possible approaches in his experiment.
A. Preparing
B. Prepared
C. Having prepared
D. Prepare

网友回答

A. Preparing
(答案→)B. Prepared
C. Having prepared
D. Prepare
解析：考查过去分词做状语：句意：准备好了研究材料，他决定实验的三个可能的方法。Be prepared with准备好了，所以这里用过去分词做状语，表示状态，如果是prepare表示动作“准备”，选B。
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