题目内容
6．Danny's parents__________ dinosaurs．（ ）| A． | are all | B． | are both | C． | both are | D． | all are |
分析 丹尼的父母都是很守旧的人．
解答 答案：B．
all意思是"三者或三者以上都"；both意思是"两者都"all和both都是要放在be动词之后．根据"Danny's parents"可知父母是两个人，所以要用both，又因为both要放在be之后，故选B．
点评 首先要掌握这几个不定代词的意思以及用法，然后结合具体的题目，就可以确定正确答案．
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