题目

-Throwing rubbish on the ground is considered to be a bad habit. --Sorry Madam, I won't do that againA.thought B.afforded C.introduced 答案：【答案】A【解析】句意：——把垃圾扔在地上被认为是一种坏习惯。——对不起，夫人，我不会再那样做了。考查动词词意辨析。thought 认为；afforded买得起，承担得起；introduced介绍，引见。根据句意可知“considered”意思是“认为”；故选A。下列问题的研究中，未利用对比实验思想方法的是