感谢各位前辈的思路,但是感觉3个问题中至少有两个点的都不透。 PREP中已确认答案是D。 下面是我的分析: To develop…, demographers would have to…more than now they do about…
A. have to错应使用would have to,见C。此处的比较为状语比较, 不可省略主谓。见E B. have to错应使用would have to,见C。economical为cheap or not wasteful的意思,而economic 却relating to trade, industry, and the management of money,是考点,但应最后来考虑。 C. economical错见B。 D. would have toMingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">,表示一件应当做但没做的事,表示现在应该如何,但事实与之不符(或相反)。原题中有more than nowMingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">的重要提示,则一定要用虚拟表达“本应该”的意思。此处的比较为状语比较, 不可省略主谓。 E. 此处的比较为状语比较, 不可省略主谓。省略则变成了a great deal(information of other n.)和一个时间在比较。
知识点: 一、 MingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">状语从句的"MingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">简化"MingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">现象常存在于两种情况: (1)MingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">当状语从句的主语是it,MingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">且谓语动词是beMingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,itMingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">和beMingLiU","serif"; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">要完全简化掉。例如: If (it is) possible, he will help you out of the difficulty.如果可能的话,他会帮你摆脱困境。 (2)当状语从句的主语和主句的主语一致时,从句可以将主语和be动词简化掉。常用于以下几种情形: a.连词+形容词 b.连词+名词 c.连词+现在分词 d.连词+过去分词 e.连词+不定式 f.连词+介词短语
二、 关于economic和economical
ec‧o‧nom‧ic S3 W1 1 [only before noun]PE relating to trade, industry, and the management of money [↪ economy]:
! Do not confuse with economical (=cheap or not wasteful).
三、
would have to知识点前面已有楼谈到,已比较透彻。谢谢。
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