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１．

____, domesticated grapes grow in clusterw, range in color from pale green, black, and contain sugar on varying qrantities.

(A) Their botanical classification as berries

(B) Although their botanical classification as berries

(C) Because berries being their botanical classification

(D) Classified botanically as berries

answer is ??求教Ｂ＆Ｄ的不同

２．

Most fishes and many reptiles have ribs along most of the spine, but in mammals____only in the chest area.

(A)they are found

(B)finding them

(C)in which they are found

(D)are found

answer is ??they, them refer ??笨&不通

1、选D
句子的主语是grapes , 后面是平行结构grow…, range…, and contain…。空格后的句子已完整，那么空格处就应该是同位语，状语从句，分词等修饰成分。A中Their指代不明，而且classification和berries也不相符，错；B中Although为conj.，后面应该是完整句，错；C中Because为conj.，后面应该是完整句，错。

2、选A
缺主语和谓语。该句不是定语从句。可以看到两句之间有个连词"but",所以后面这部分必须是完整句。