◎ 题干
She often helps the old ____ their housework.
[     ]
A. of
B. in
C. at
D. with
◎ 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“She often helps the old ____ their housework.[ ]A. of B. in C. at D. with…”主要考查了你对  【介词】  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。