prep1-95 prep1-131 不一致

131.
                (31462-!-item-!-188;#058&004501)

The particular design of muscles and bones in the neck and limbs of the turtle allow that it can draw in its exposed parts such that an attacker can find nothing but hard shell to bite.

(A) allow that it can draw in its exposed parts such that

(B) allow it to draw in its exposed parts, and so

(C) allows for it to draw in its exposed parts and that

(D) allows that it can draw in its exposed parts, and so

(E) allows it to draw in its exposed parts, so that

Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.

(A) it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are

(B) it takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is

(C) in the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being

(D) mountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus

(E) mountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are

我的问题是and so为什么在两题中是矛盾的？

95题的正确答案有and so，而在131题中是错误的？

虽然不能否认他们在各自的题里都是最佳选项

131错误的还有allow要用allows...

不过语法笔记上说and so是错误的

所以还是问and so到底对或错？

131从逻辑意思来看划线部分后半句应该是一个结果状语从句，所以用so that

95可以用排除法，由Unlike frogs that...可以排除ABC，剩DE；

再看D，逗号+thus代表其后应是完整的句子，而划线部分后面无主语无谓语，仅仅一个过去分词短语作伴随状语；从逻辑上看，这是两个有因果关系的动作，要表达出它们之间的逻辑关系应该用并列句，伴随状语不合适，D叉掉；

最后看E，逗号+and代表其后也该是个完整句子，选项补出未划线部分的主谓they are，与后面形成了完整句子且so表达出了两个句子之间的逻辑上的因果关系。在不确定“,and so”正确与否的情况下看选项，E是比D好的。

逗号+and so的用法我没见过，觉得有点奇怪别扭，待考证。SC的宗旨是相对较好错误较少的选项为正确，E可能不完美但它就是答案。

我查了词典朗文的

有个例句是

They diluted the drug, thus reducing its effectiveness.

thus在这里的意思是in this manner or way....

那这样的话,",+thus"后面可以接分词呀...

D感觉也说的通呢?请教NN们