Renshou_ a lot in the last 3 years. It’s now one of the most important cities in Meishan.A

问题补充：

Renshou_ a lot in the last 3 years. It’s now one of the most important cities in Meishan.

A. changed

B. changes

C. has changed

D. had changed

答案：

A. changed

B. changes

(答案→)C. has changed

D. had changed

解析：句意：仁寿在过去的三年里已经有了很大改变。在梅山它是最重要的城市之一。分析：通过句意体现为现在完成时，现在完成时的构成：have/has+done(动词过去分词), 主语是单数，因此用has.故选 C