请教了！

nkwyl

以下几道语法题不太明白，请帮助解释一下，先谢了！

6.Salt is manufactured in quantities that exceed those of most,.......,other commercial chemicals.

A.of an not

B.not if an are

C.are not an

D.if not an

答案： d   

D为什么是对的？

12.Scientists believe that by [altering] the genetic composition of plants it is possible to develop specimens that are [resisting] to [disease] and have [increased] food value.

答案：b

是不是are resisting应改为resist？

16.The early railroads were........the existing arteries of transportation: roads,turnpikes,

canals,and other waterways.

A.those short lines connected

B.short lines that connected

C.connected by short lines

D.short connecting lines

答案：b

我觉得a 与b 差不多呀，a 可以认为是分词做后置定语吗？

20.Bromyrite crystals [have] a diamond-like luster and are usually [colorless],but they [dard] to brown when [exposed] to light.

答案：c

不明白为什么是c?

22.James Baldwin's plays and short stories,[which are] to [some degree] autobiographical,established [them] as a [leading] figure in the United States civil rights movement.

答案：c   

them不是指plays and stories吗？

zhoushao

下面是pumpkinＪＪ的回答

６：

偶觉得是这样：
==> Salt is manufactured in quantities that exceed those of most other commercial chemicals, even if it does not exceed anther commercial chemical.

if not an是个让步的插入成分

１２：应该是改成resistant

１６：系表结构＋定语从句

２０：darken

２２：改为him

zhoushao

偶来补充以下：１６：Ａ不能认为是后置分词作定语，因为语态不一样了，应该是connecting才对．

６：The actual answer choice D reads "if not all".  Obviously, D is the best answer here

２０：偶认为是are darken

２２：看此贴http://forum.chasedream.com/dispbbs.asp?boardID=58&ID=73527&page=1

zhoushao

ＧＧ呀，看到你问的题感到很面熟，偶找了半天，终于找到出处了，看这个贴

http://forum.chasedream.com/dispbbs.asp?boardid=58&star=1&replyid=563211&id=62867&skin=0&page=1

下次问问题要按照语法区的格式提问哦，要不罚酒三杯！！！

具体格式见置顶的帖子http://forum.chasedream.com/dispbbs.asp?boardID=58&ID=41020&page=1

[此贴子已经被作者于2004-10-17 12:52:48编辑过]

nkwyl

谢谢了，MM

终于明白了。

下次一定改正，谢谢MM批评指正！