He paid the boy 10 yuan foe washing ten windows, most of ____ hadn’t been cleaned for at least a year.
A. these B. those C. that D. which
He paid the boy 10 yuan foe washing ten windows, most of ____ hadn’t been cleaned for at least a year.
A. these B. those C. that D. which
D
非限制性的定语从句，which 做of的宾语。