先找main conclusion:Such reasoning might well be overoptimistic
看到后面跟着since, BF2 得知BF2用来支持conclusion,排除BCE
再看BF1,BF1前面有一个SINCE,即代表他是来支持后面的conclusion(不是本文的mainconclusion):” the bank's depositors, who had been worried by rumors that the bank faced impending financial collapse, have been greatly relieved. “ 则选A。
在AD中选的时候,看到BF1、2中间有However就知道方向相反了,直接选A
错选C:香烟不能主动使用纸