题目内容：
He paid the boy $10 for washing ten windows,most of ____ hadn't been cleaned for at least a year.
A. these
B. those
C. that
D. which
参考答案：
选择题：He paid the boy $10 for washing ten windows,most of ____ hadn't been cleaned for at least a year.
- 题目分类：成人英语三级
- 题目类型：选择题
- 查看权限：VIP
A. these
B. those
C. that
D. which