Nine in ten high school students say there are significant differences in their attitude toward chatting on line, pared with of their parents.
A. those
B. that
C. it
D. one
网友回答
A. those
B. that
C. it
D. one
解析：句意：10个高中生里面有9个说：和父母的态度相比，他们对网上聊天的态度有很大的不同。这里需要代词指代attitude，用those指代前面的可数名词复数，that指代可数名词单数或不可数名词，it是指代同类同物，one是泛指可数名词单数，所以选B。