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I have some probs with theses 6 questions, anyone can help me? thx!!!
1. Collagen, a strong rubbery protein, supports the ear flaps and the tip of nose in humans.
2. The musical comedy Oklahoma did much to expand the potential of the musical stage, and it encouraged others to attempt_____
a)original themes b)to original themes c)that were original themes d)how original themes
why not b)?
3.Perhaps the most sinificant postwar trend was the decentralization of cities throughout the U.S, ____ when massive highway-building programs permitted greater suburban growth.
a)and accelerated a phenomenon b) a phenomenon that accelerated
why not a) for this question?
4.Some areas of the deep sea are vulnerable frequent natural distances taking the form of intense currents, mud slumps, low oxygen, and upwellings.
answer is A, but how to correct?
5. Sand is formed by the weathering and decompositionof all types of rock, _____ most abundant mineral constituent being quartz.
a) and its b)since its c)its d)it is
the answer is c), but there is no conj, how to connect these 2 sentences.
6. It is said that no potential frontier has such fired the imagination or challenged the ingenuity of humankind as has space.
the answer is b), how to correct it?
[此贴子已经被作者于2004-4-12 17:59:52编辑过] | 
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发表于 2004-4-12 13:58:00
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