这条题我问了一个哈佛的牙医博士,美国人,他说他题目也要看三次,结果选了C,我把聊天记录发上来给大家看一下~
我问了他三个问题“i have three questions about this sentence, 1st, why the word "would" must be added ,is it some kind of subjunctive mood? 2nd,"economial " means cheap or money-saving? 3rd,why "they do" after "more than" can not be omitted?”
他说“if you say know more,then you have to follow with what you know more about,so you can put know more about ? than they do know”
“and they must be addressed again with "they do now" otherwise the sentence is incomplete”
“as an adjictive it can be used in relation to economy like in "aspects of social, political, and economical life"
"they do must be added to complete the mention of demographers"
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