题目内容
9．____ they eat _____food？（ ）| A． | Are； healthy | B． | Do； healthy | C． | Do； health | D． | Are； health |
分析 他们吃健康的食物吗？
解答 答案：B考查助动词．根据题干：____ they eat _____food？句中eat是行为动词原型，不能再用系动词are，故排除A、D．第二个空修饰名词food要用形容词，healthy是形容词，health是名词，故选择B．
点评 考查助动词．准确的分析句子结构，根据句子结构选择合适的助动词及形式是解题的关键．
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