题目内容
17．-May I speak to the headmaster？-He ____ a meeting now．Can I take a message？（ ）
| A． | is having | B． | had | C． | has | D． | will have |
分析 -我可以和校长说话吗？
-他现在正在开会．我可以捎个口信吗？
解答 答案：A 联系前后语境，根据关键词now，可知这是现在进行时的标志词，指现在正在进行或发生的动作．此句中指校长正在开会．现在进行时的构成为am/is/are+现在分词．因为句子的主语为第三人称单数he，所以助动词用is，应用is having．故选A．
点评 此题考查现在进行时的用法．做题时一定要联系语境并抓住表时间的关键词准确判断出时态；再运用相关时态的构成得出正确的答案．并注意助动词的变化．
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