一些问题救急啊

willway

[1.A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars,[U] and make the construction industry's economic health much more robust than 5 years ago.[/U]

为什么画线部分不能用making the construction industry's economic health much more robust than 5 years ago. 呢?

2. where once 是什么意思

3.[U]for all his professed disdain of such activities[/U], A was an inveterate literary gossip.
画线部分若改成having always professed disdain for such activities.错误有哪些

4.a common disability in test pilots is hearing impairment, [U]a consequence of sitting too close to large jet engines for periods of time.[/U]

a consequence 指代的就是hearing impairment
为什么不能改为damaged from sitting too close to sitting too close to large jet engines for periods of time ?    -ed放句尾不就是就近修饰名词吗?

5[U].it may someday be worthwhile to try to recover uranium from seawater[/U], but at present this process is prohibtively expensive.

如果改为recovering uranium from seawater may be worthwhile to try to do someday是不是RECOVERING 和DO 同义重复了?

6.THE school board ruling mandating that physically handicapped students [U]be placed in regular classroom setaptings whenever possible also assured all children who have a reading problem of special aid.[/U]

为什么不能改为be placed in regular classroom setaptings whenever possible also assured all children with reading problems

7.opperative apartment houses have the peculiar distinction[U] of being dewllings that must also opearte as businesses.[/U]
being 加在这里什么意思,做什么成分,不会显得罗唆吗

8.Dr. H argues that [U]just as polio vaccine is given to every person to protect the few who might actually contract polio[/U],mass dietary is needed to protect the significant number who are suceptible to the life-threatening effects of press eating habits

化线部分若改为like polio vaccine, which is given to every person to protect the few who might contract polio 有什么错误,强调的重心不一样吗

linsonstudy

5。 你不觉得改后的那个句子读起来很别扭吗？
6。本来是assure sb。 of  sth。 的句型，如果改成你所说，那就掉了 of sth。
7。我认为being在这里是强调的作用，突出两者的 distinction 。
8。“just as polio vaccine is given to ...” 和下面的 “mass dietary is needed to protect ”
   平行。而改后的句子结构好别扭。

linsonstudy

1。改为making的句型，那根据就近原则主语应该指dollars；用 and make 主语才是 rise 。
2。原句是什么？
3。我只知道for不能用在这里。
4。hearing 才能 damaged from ，hearing impairment 不能 damaged from ，而要用
resulted from。