◎ 题干
He is said _________ his homework when the class teacher entered the classroom.

A. to do
B. doing
C. to have finished
D. to finish
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“He is said _________ his homework when the class teacher entered the classroom. [ ]A. to do B. doing C. to have finished D. to finish …”主要考查了你对  【不定式的完成式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。