有趣的长难句15
昨天的正确答案是D，你答对了吗？昨天的改写很有意思，它把contrary to the arguments of some that much of the pacific was settled by Polynesians accidentally marooned after being lost and adrift的长句直接改成了accidental as some people have proposed。这种改写能力在综合作文里是必考能力，口语题里也有，相对要简单一些。
今天的题目选自《The Cambrian Explosion》，寒武纪爆发指的是生命起源并爆发性多样化发展时期，虽然由于缺少足够的化石，科学家无法判断当时的生命逐一演化的进程和顺序，但是，仍然有很多已经灭绝的寒武纪时期动物群在化石中被发现。其中，在俄罗斯托莫特地区发现的托莫特壳类动物化石，里面含有软体动物生命体，属于寒武纪早期。
At one time, the animals present in these fossil beds were assigned to various modern animal groups, but most paleontologists now agree that all Tommotian fossils represent unique body forms that arose in the early Cambrian period and disappeared before the end of the period, leaving no descendants in modern animal groups.
Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?
A. The animals found in the Tommotian fossil bed were once thought to belong to a variety of modern animal groups, but now they are thought to have descended from a single group.
B. Animals in the Tommotian fossil beds were initially assigned to modern animal groups but are now thought to belong to groups that emerged and died out during the Cambrian period.
C. Though at first they thought otherwise, paleontologists now agree that the animals in the Tommotian have body forms from which modern animals have descended.
D. It is unclear whether the Tommotian fossils from the early Cambrian period represent unique body forms or whether they should be assigned to various modern animal groups.
ABCD四个答案哪个是正确的？解答长难句，消磨微雨时光。
