GMAT语法的问题37.★★ One report concludes that many schools do not

GMAT语法的问题
37.★★
One report concludes that many schools do not have,or likely to have,enough computers to use them effectively.
(A) or
(B) nor
(C) or are
(●) nor are they
(E) nor are not
答案给的是D.我TOTALLY 不理解；我选的A.
54.★★
Unlike using spices for cooking,in medicinal usage they are taken in large quantities in order to treat particular maladies.
(A) Unlike using spices for cooking,in medicinal usage they are taken
(B) Unlike spices that are used in cooking,in using spices for medicine,they are taken
(C) Unlike cooking with spices,taking spices for medicinal use is done
(●) In cooking,small quantities of spices are used,whereas in medicinal usage spices are taken
(E) In cooking,the usage of spices is in small quantities,whereas in medicinal usage they are taken
答案给的是D,我选C.我看到UNLIKE A,B do 结构就选了C.
55.★ ★
Shipwrecks are more likely to be found undisturbed at great depths than in shallow coastal waters,which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear,whether they be archaeologist,treasure hunter,or sport diver.
(A) than in shallow coastal waters,which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear,whether they be
(●) than in shallow coastal waters,where archaeological remains are exposed to turbulence and are accessible to anyone in scuba gear,whether
(C) as opposed to shallow waters along the coast,where archaeological remains are exposed to turbulence and are accessible to anyone in scuba gear,including
(D) instead of in shallow waters along the coast,which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear,including an
(E) instead of shallow coastal waters,because it exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear,whether
我选的A.我想不明白的是where 修饰什么东西啊?我的思路是more than; 直接干掉CDE.然后where 前好象没有地点,就直接选A.答案给的是B.

第一题：
One report concludes that many schools do not have, nor are they likely to have, enough computers to use them effectively.
考点：be likely to do sth.
这里nor are they是倒装了, 用nor也有强调的意思在里面；用or的话,缺少be动词
第二题：
不要一看到什么词就马上做出选择,仔细分析最重要!
D项对应的很整齐,whereas连接两个对比的成分,sth. be used whereas sth. be taken
第三题：
B项是where引导的状语从句,
Shipwrecks are to be found 是句子主干,后面不需要谓语了.
并且B项的are exposed to and are accessible 对应很工整, whether ... or .. 这里也不加be才对.