◎ 题干
I'm quite willing for your brother ____ us.
[     ]
A. to join
B. joining
C. should join
D. joined
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“I'm quite willing for your brother ____ us. [ ]A. to join B. joining C. should join D. joined …”主要考查了你对  【不定式】  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。