Question

帮我解答几道高三英语语法题

30. He was not here. Since he had already had his papers corrected, he _____behind.
A. needn’t have stayed B. mustn’t have stayed
C. didn’t need to stay D. shouldn’t stay 答案选C 我错选了B
31. The strike _______ so much violence and trouble finally ended after both sides rea ched an agreement.
A. caused B. causing C. caused by D. had caused 答案选B 我错选了D
34. No one knows _______ prevented the fire from spreading.
A. what was it that B. what it was that C. how it was that D. why it was that
答案选B我选了C
35. The patient who had suffered from H1N1 insisted on from others immediately, holding the belief that the disease would infect others．
A．having isolated B．being isolated C．to be isolated D．isolating
答案选B我选了C
麻烦帮我解答一下理由 和排他的原因
38. The English program normally attracts more than 1,000 students a year, ______ up to half will be from abroad.
A. in which B. for whom C. with which D. of whom
为什么选D?
新补充：30题的A和D有什么区别么?

Answer 1

30. 没有mustn't这样的说法。must的否定一般用
needn't 表示“不必要”或don't/didn't need to
选C表示他不必要留下来，如果A改为needn’t stay就正确。D意为不应该留下来，不正确。

31. __causing_____ so much violence and trouble 是现在分词短语作定语修饰主语the strike，其他都不合适。had caused 只能做谓语。
ended 是整句话的谓语。

34. No one knows _______ prevented the fire from spreading.
该句意思是“没有人知道是什么阻止了大火的蔓延。”明显不能用how.
that prevented the fire from spreading是一个定语从句，修饰what.

35. insist on 是一个固定搭配，后面要跟动词的-ing形式。因为是表示病人要被隔离，所以用被动语态being isolated.

38.of whom up to half will be from abroad.是一个从句，修饰1000students. 指1000个学生当中的一半是来自国外。
up to half of the more than 1,000 students will be from abroad.

Answer 2

30。must表示猜测时的否定形式是needn't或者don't need

31.这里完整的应该是the strike which caused so much.....,是一个定语从句，现在把定语从句改为后置定语形式，应为是主动形式所以用ing形式也就是causing，而如果选D在finally前就已经是一个完整的句子，后面有用ended。。。那么这个句子中就有了2个谓语，就是错句，一个完整句子中只能出现一个谓语

34。这里是“什么东西”阻止了而不是“如何”组织了，而且C语法也不对
35。介词+动词ing形式是固定的语法搭配
38。句子意思是：其中一半来自海外，陈述句形式是up to half of them will be from abroad,因为them指代1000 students，而且又在非限制性定语从句中做宾语，所以是whom，与of一起提前就是of whom

Answer 3

30.mustn’t have stayed表示不许，带有强迫性;而didn’t need to stay表示没有必要，因为他已经完成论文。
31.句中_______ so much violence and trouble用来修饰strike(罢工)，并且与strike逻辑关系是主动关系，所以cause要用ing形式。
34.“谁也不知道是什么原因阻止了火势的蔓延”，由此可知，疑问代词为what而不是how或why. 选B。
35.insist on doing sth是固定句型。
38.还原up to half (or whom)will be from abroad.