题目内容
20．My son wants a toy train for long，but I have no time to get ______ for him．（ ）| A． | it | B． | one | C． | this | D． | that |
分析 我的儿子想要一个玩具火车很久了，但是我没有时间给他买一个．
解答 答案：B．这道题考查的是：one代替同一类，it代替同一个．在句中one指的是一个玩具火车，代替的是同一类．应选：B
点评 this和that是指示代词，this意思是：这个，that意思是：那个．明显不符合题意．同学们在做这类题的时候，只需要先判断代替的是同一个还是同一类．
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