问题：
[单选] In the last few years，there________great changes in the country．A . had been
B . were
C . have been
D . has been
参考答案：C
参考解析：
“in the past／last…”用现在完成时态，There is／are…的现在完成时态是There have／has been．．．
In the last few years，there________gre
In the last few years，there________great changes in the country．
