请教几道语法题

0308
2． The English colonization of Virginia was devised in 1606 by a group of merchants _________ the Virginia Company of London.
(A) who formed
(B) formed
(C) who they formed
(D) they formed
答案是A，如果选B是怎样一个错法

7． Living organisms contain more water _________ substance.
(A) than do any other
(B) does than any other
(C) other than do they any
(D) than they do any other
我选A，答案是D，为什么？

11． In jazz music, a riff is a simple melodic figure, _________ and repeated several times.
(A) usually one or two measures lasted
(B) lasted one measure or two usually
(C) is lasting one or two measures usually
(D) usually lasting one or two measures
我选了B，答案是D，为什么

12．At its center, the sun has a density of over a hundred times _________ and a temperature of 10 to 20 million degrees centigrade.
(A) that of water
(B) of water
(C) than that of water
(D) water
我选了C，答案是A，为什么

0308
2． The English colonization of Virginia was devised in 1606 by a group of merchants _________ the Virginia Company of London.
(A) who formed
(B) formed
(C) who they formed
(D) they formed
答案是A，如果选B是怎样一个错法

多谓语了如果修B

2． The English colonization of Virginia was devised in 1606 by a group of merchants _________ the Virginia Company of London.
(A) who formed
(B) formed
(C) who they formed
(D) they formed
答案是A，如果选B是怎样一个错法

解释：１．ＷＨＯ引导的定语从句，作主语，所以ＷＨＯ不可以省略

　　　２．不加ＷＨＯ，使得这个句子有２个谓语，错误

7． Living organisms contain more water _________ substance.
(A) than do any other
(B) does than any other
(C) other than do they any
(D) than they do any other
我选A，答案是D，为什么？

解释：１．ＴＨＡＮ后面句子的主语是substance，再加ＴＨＥＹ，使得后面句子有２个主语，错误

11． In jazz music, a riff is a simple melodic figure, _________ and repeated several times.
(A) usually one or two measures lasted
(B) lasted one measure or two usually
(C) is lasting one or two measures usually
(D) usually lasting one or two measures
我选了B，答案是D，为什么

解释：１．ＬＡＳＴ是a simple melodic figure的主动动作，而repeated是a simple melodic 　　figure的被动动作

　　　２．注意：现在分词可以和过去分词并列

12．At its center, the sun has a density of over a hundred times _________ and a temperature of 10 to 20 million degrees centigrade.
(A) that of water
(B) of water
(C) than that of water
(D) water
我选了C，答案是A，为什么

解释：１．这里ＴＨＡＴ指代density

　　　２．只有在有比较级形容词，如ＭＯＲＥ＋ＡＤＪ／ＡＤＪ＋ＥＲ时，才可以用ＴＨＡＮ

7． Living organisms contain more water _________ substance.
(A) than do any other
(B) does than any other
(C) other than do they any
(D) than they do any other
我选A，答案是D，为什么？

解释：１．完整结构是，

Living organisms contain more water than they have any other substance.

选Ａ，意思变为 any other substance contain water,逻辑错误