The number of workers in this factory a lot this year．There were only a few workers in it two years ago．( )A．have increasedB．has increasedC．have risenD．has booked 题目和参考答案——青夏教育精英家教网—

题目内容

7．The number of workers in this factory _______ a lot this year．There were only a few workers in it two years ago．（　　）

A．

have increased

B．

has increased

C．

have risen

D．

has booked

分析这家工厂工人的人数今年增加了很多．两年前，工厂里仅仅有几个工人．

解答答案：B．
The number of表示…的数量，它作主语的时候应该把它当作单数看待，谓语动词用第三人称单数，选项AC这里用的是have是复数，故排除A和C．再根据There were only a few workers in it two years ago，可知两年前，工厂里仅仅有几个工人，可以推知今年应该是增加了许多，强调对现在的影响，increase增加，现在完成时的构成是：have/has+动词过去分词，根据The number of workers 这里指工人的人数，作主语谓语动词用单数，have的单数形式是has，所以这里用has increased．故选B．

点评本题考查了有关现在完成时的一些知识．解答时注意短语the number of 的用法．