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怎么理解?

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1.Children get HIV by receiving infected blood transfusions or,____,through birth. A.in Jane's case B.as in Jane's case C.in case of Jane D.with Jane's case 2.--Why do you look so upset?
--There is a lot of homework ____. A.remaining to do B.to remain done C.remained to be done D.remaining to be done 3.Perseverance is a kind of quality and that's ___it takes to do anything well. A.what B.that C.which D.why
怎么理解?
解题思路: 见下
解题过程:
1.Children get HIV by receiving infected blood transfusions or,____,through birth. A.in Jane's case B.as in Jane's case C.in case of Jane D.with Jane's case 选B. 这里是as引导的非限制性定语从句代替一句话的内容。句子意思:就像jane的情况一样,孩子们是通过输血或出生的时候被感染上HIV. 2.--Why do you look so upset?
--There is a lot of homework ____. A.remaining to do B.to remain done C.remained to be done D.remaining to be done 选D。由于remain是不及物动词,所以这里homework和remain成主谓关系,用现在分词形式,排除B和D两个答案,再根据homework和do成被动关系,所以用remaining to be done.句子意思是:---为什末看起来如此伤心?===有许多作业有待被做。 3.Perseverance is a kind of quality and that's ___it takes to do anything well. A.what B.that C.which D.why
选A。首先弄清这一空引导的从句放在is之后是表语从句,在表语从句中这一空作takes之后的宾语,而that引导名词性从句不作成份,排除B。which是“哪一个,哪一些”的意思,意思不对;why座原因状语,也不对,所以这里选A。意思是:那就是做好任何事情需要花费的东西。What往往翻译成:…的.
最终答案:略