◎ 题干
They spent as many hours as they could ___their lessons.
A.study               
B. to study           
C. studying
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“They spent as many hours as they could ___their lessons.A.studyB. to studyC. studying…”主要考查了你对  【实义动词的单数第三人称形式】【实义动词】【动词短语】  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。