题目内容
19．---How's the weather in your city？---It _________．（ ）| A． | rains | B． | is raining | C． | has rained | D． | will rain |
分析 --你们城市的天气如何？
--正在下雨．
解答 答案：B
根据前面的疑问句"你们城市的天气如何？"询问的是现在的天气状况，可以推断设空处的动作"下雨"正在进行着，所以用现在进行时．现在进行时的构成是：主语+am/is/are+动词的现在分词；主语是第三人称单数，be动词用is，rain的现在分词是raining．故答案为B．
点评 本题考查了动词的时态．做题时，一定要特别关注有关的时间短语，这是判断句子时态的标志．在没有时间状语的情况下可以联系上下文根据语境来做出正确判断．
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