下面这几题, they believe / scientist agree / they say 到底在句子中做什么成分，是主语，还是插入语。他们决定了关系代词的主宾格形式(who / whom)，后面动词的形式 (do / done / to do...)
实在困惑，还请牛牛们谁来看看。
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大全 05-09 - Astronomers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.
(A) that they believe is
(B) that they believe it to be
(C) they believe that it is of
(D) they believe that is
(E) they believe to be of (选E)
OG12 118 - The World Wildlife Fund has declared that global warming, a phenomenon most scientists agree to be caused by human beings in burning fossil fuels, will create havoc among migratory birds by altering the environment in ways harmful to their habitats.
(A) a phenomenon most scientists agree to be caused by human beings in burning fossil fuels,
(B) a phenomenon most scientists agree that is caused by fossil fuels burned by human beings,
(C) a phenomenon that most scientists agree is caused by human beings's burning of fossil fuels, (选C)
(D) which most scientists agree on as a phenomenon caused by human beings who burn fossil fuels,
(E) which most scientists agree to be a phenomenon caused by fossil fuels burned by human beings,
大全 E-04
In June, 1981, six teenagers in the village of Medjugorje, Yugoslavia, claimed to have had visions of the Virgin Mary, who they say has continued to appear to them over the ensuing years.
(A) claimed to have had visions of the Virgin Mary, who (选A)
(B) claimed to have visions of the Virgin Mary, whom
(C) claimed to have had visions of the Virgin Mary, whom
(D) claimed to have visions of the Virgin Mary, who
(E) had claimed to have had visions of the Virgin Mary, whom | 
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发表于 2011-3-26 12:32:29
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