求助几道语法题(0005)谢谢！

uspresidentUID: 2123602

今天又做了一套题，还是有些不明白:confused:希望大家能够帮忙解答一下，谢谢！:)
4. Stars shine because of ---- produced by the nuclear reactions taking place within them.
(A) the amount of light and heat is
(B) which the amount of light and heat
(C) the amount of light and heat that it is
(D) the amount of light and heat
为什么选D呢？不是应该被动的吗？而且如果说是从句省略的话，不是就没有谓语动词了？
24.Dolphins are sleek and (powerful) swimmers (that found) in all seas and unlike porpoises, (have) well-defined beaklike snouts and conical (teeth).
为什么不能选C呢？不是谓语动词不专一了吗？谢谢
28. A liquid that might (be) a poor conductor (when pure) is often used (to) make solutions that readily (transmits) electricity.
选D是没错，但是pure不是形容词吗？这样用好像更加不对阿。。。

[ Last edited by uspresident on 2005-12-18 at 14:08 ]

hz_jamesUID: 2113536

4.because of 后面接名词，空格后面省略了which are，整句话的谓语动词是shine.
8.前后不存在因果联系，只是并列的陈述事实，为什么要用because？
24.b中有个连词that，所以少了个谓语are，要不就不满足“黄一”了
个人的一点意见，仅供参考~~~：）

[ Last edited by hz_james on 2005-12-18 at 22:29 ]

绵羊UID: 206246

24. 谓语是"are .... and have","unlike porpoise"是插入语，满足谓语动词专一。

tc_zn2001UID: 187494

选D是没错，但是pure不是形容词吗？这样用好像更加不对阿。。。
所以是状从省略啊
when it is pour

uspresidentUID: 2123602

谢谢大家，帮助很大

Psyche_XuUID: 2167815

when it is pure对。
24我还是不太懂，为什么are...也要算为插入语一部分啊？似乎不行

egbertUID: 2157301