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
D选项说的是那些已经有长期储蓄账户的居民会从这些原先的账户里面把钱转去这种新的账户