◎ 题干
—Do you enjoy ______ a volunteer? 
—If you want ______ this, you'd better join us. 
[     ]
A. being; knowing
B. to be; knowing
C. being; to know  
D. to be; to know
◎ 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“—Do you enjoy ______ a volunteer?—If you want _______ this, you’d better join us. [ ]A. being; knowingB. to be; knowingC. being; to knowD. to be; to k…”主要考查了你对  【不定式】【动名词】  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。