◎ 题干
—They are discussing what to do for the disabled. 
— _______ is necessary to provide them with more positions.

A. That
B. This
C. It
D. There
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“—They are discussing what to do for the disabled. — _______ is necessary to provide them with more positions. [ ]A. That B. This C. It D. There …”主要考查了你对  【it的用法】  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。