问题
选择题
Nine in ten high school students say there are significant differences in their attitude toward chatting on line, compared with _________ of their parents.
A．those
B．that
C．it
D．one
答案
B
题目分析：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。