题目内容
19.Look!A dog ____a blind man across the road( )| A. | leads | B. | lead | C. | is leading | D. | led |
分析 看!一只狗正在引导一个盲人过马路.
解答 答案:C 根据时态标志词"look!",可知这是现在进行时的标志词.现在进行时的构成为is/am/are+doing.主语"a dog"为第三人称单数,故应该用is.故选C.
点评 本题考查现在进行时.每个时态都有自己的时态标志词,平时多记熟记牢.做题时看到这些标志词就要立马反映出用何种时态,时态构成是什么.
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