A，consider本身只有两种用法，consider A B,和consider to do .当意为“看作”时候是客观的，应该用名词结构，即consider A B,当意为“认为”的时候更具有主观色彩，约束力较强，用consider to do 。本句中EBB这个人被看作是优秀的诗人，被大众看作是，当作是，而不是某个人的主观看法。
C的错在于modifiers NEVER start with "and". the whole thing about the history of high blood pressure has to be a modifier, modifying the young people; not only is this not a modifier (because it starts with "and"), but it doesn't even tell us that we're talking about the young people's families. it merely says "the" family.
我觉得文章二句，首句是描述事实： scientists typically do their most creative work before the age of forty.
然后第二句是对其解释，指出普遍看法，所以我觉得这是conclusion：It is commonly thought that this happens because aging by itself brings about a loss of creative capacity.
第三句也就是第一句黑体字前面由however引出，表明是对前面立场的反驳，也就是反驳上句所列出的解释explaination.
但是，这句由studies show that...引出，为事实，不能做立场，所以是论据，支持谁呢？也就是找出一个和第二句相对的对于一句的解释的句子，这时候便找到了第二句黑体字
D句子不完整
Ron: specifically, 'while they ... too powerful' is a subordinate clause, which means that the rest of the sentence must be an independent clause (i.e., a clause that could be its own standalone sentence) to make grammatical sense. unfortunately, it isn't; there is no main verb, only a present participle ('supporting').
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跳舞组代表领导和跳舞提供娱乐之间没有逻辑关系（既不是目的也不事结果），所以应该是并列关系。A中each other是两者，彼此之间，one another是三者以及三者以上