[求助]885 大全Sec 5-5 and 9

tolaku30

大全Sec 5-5
Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2,000 years as old as any of their supposed Mediterranean predecessors.
(A) as old as any of their supposed
(B) older than any of their supposed
(C) as old as their supposed
(D) older than any of their supposedly
(E) as old as their supposedly

答案是 B 請問 為何不能選C呢？   想請問原本句意 是什麼呢？ 因為原句意不是說 as old as ... 但是為什麼要選擇older than呢？
此外 這邊一定要用their 嗎？
謝謝...

Astronomers at the Palomar Observatory have discovered a distant supernova explosion, one that they believe is a type previously unknown to science.
(A) that they believe is
(B) that they believe it to be
(C) they believe that it is of
(D) they believe that is
(E) they believe to be of

這題答案是E 想請問 B 為什麼不行呢？

請各位大峽 解答 謝謝...

allfar

两道都是OG....

tolaku30

謝謝您
我找到答案了 ^^ 感激