问题
选择题
Many people think any government's work should be evaluated ______ on citizens' happiness level．
A．based
B．to be based
C．basing
D．being based
答案
答案：A
题目分析：句意：很多人认为任何政府的工作应该以市民的兴奋指数的为基础来评价。这里是方式状语，government's work和base是被动关系，所以用过去分词做状语。所以选A。