GWD24套第23套几到语法题请大牛指点

Q27: PP57.

Whereas scientists, because of random fluctuations in the weather, can not determine the transition from one season to the next by monitoring temperatures on a daily basis, so they cannot determine the onset of global warming by monitoring average annual temperatures.
            

A.      Whereas scientists
        

B.      Just as scientists

C.      Like scientists who

D.      Inasmuch as a scientist

E.       In the same way a scientist

正确答案: B 

Whereas, just as, inasmuch as, 的用法与区别。

Archaeologists in Egypt have excavated a 5,000-year-old wooden hull that is the earliest surviving example of a “built” boat—in other words, a boat constructed out of planks fitted together—and that thus represents a major advance, in terms of boat-building technology, over the dugout logs and reed
                    vessels of more ancient vintage.

A.     together—and that thus represents

B.       together—and this has represented

C.      together, and it represents

D.      together that was representing

E.       together to represent

正确答案:A

--and that thus...什么用法啊?不懂.

Q27： just as...so...固定搭配.

Q41：that跟前面的"hull that is the earliest surviving example"中的that并列，作为关系代词引导定语从句。而that后面的thus是说明了后一个定语从句承接了前一个定语从句的意思，两个定从之间存在因果关系.

谢谢斑竹，看来我语法还很薄弱啊，固定搭配，句子结构判断都没练到家...