问题
选择题
Old people shouldn’t . In fact, they have stronger and clearer minds.
A．look down
B．be looked down
C．look down on
D．be looked down on
答案
答案：D
题目分析：句意：老人不应该被小瞧。事实上，他们有更强的思维。分析：考查情态动词的被动语态的用法，构成should be done(动词的过去分词)；同时考查固定短语：look down on小瞧/看不起。故选D