问题
选择题
There __________great changes in our hometown in the past fifteen years.
A．has been
B．have been
C．was
D．were
答案
答案：B
题目分析：在过去的十五年里我们的家乡发生了巨大的变化。根据 in the past fifteen years可知，本句应用现在完成时have/has +过去分词；由于真正的主语是great changes，故用have，所以本题选B。