题目内容
20．Tony's mother is a teacher and she __________ lunch at school every day．（ ）| A． | have | B． | has | C． | had | D． | having |
分析 Tony的妈妈是一名老师，她每天在学校吃午饭．
解答 答案：B
通过观察句子结构可知该句是并列句，根据句中的时间状语every day"每天"可知句中描述的是经常发生的动作或习惯行为，故该句使用一般现在时，根据and连接的并列句中主语she是第三人称单数，在一般现在时中主语是第三人称单数，谓语动词用第三人称单数形式，结合选项可知该句中的谓语动词是have，又知have的第三人称单数是has，故选B
点评 首先要抓住句中表示时间的关键词，判断句子的时态为一般现在时，再根据主语是第三人称单数，从而确定谓语动词用第三人称单数形式，结合选项即可选出正确答案．
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