剑桥雅思5test1阅读21 35题求解释..详细一点

21题:The teacher-subjects were instructed to ?教师们（在实验中）被要求做什么？
答案是D.give punishment according to a rule.依据某种规则（向学生）施与惩罚。
文中的location:B段中line 3 The teacher-subject was told that whenever....wrong answer.
而题中具体的rule的location则是B段的第一句话。

35题：What's the writer's main point about lobby group in paragraph 6?作者对第六段中的所述的游说团体抱持何种观点？
答案是C.Some receive more criticism than others.一些会受到更多地批评。
文中的location：第六段最后一句话，即p25 line 2,...they are doing more harm than good....它们功不抵过。