OG126

126. More than thirty years ago Dr. Barbara McClintock, the Nobel Prize winner, reported that genes can "jump," as pearls moving mysteriously from one necklace to another.

(A)  as pearls moving mysteriously from one neck­lace to another

(B)  like pearls moving mysteriously from one neck­lace to another

(C)  as pearls do that move mysteriously from one necklace to others

(D)  like pearls do that move mysteriously from one necklace to others

(E)  as do pearls that move mysteriously from one necklace to some other one

Choices C, D, and E are all faulty because the verb do suggests that the migrating pearls are presented as a real phenomenon, not as a figurative illustration. 对于这个解释有点疑惑，它是说是种虚拟情况吗？我总觉得这题应该用AS进行比较会比LIKE好，但是选项没有AS正确答案，我觉得这句更强调动作的比较。不知对否？

首先，like和as都可以表达比较关系，而like是介词，只能跟名词结构，而as在表达这个意思时是连词，所以只能跟句子；

CDE中都使用的助动词do来替代动词jump，显然，前面的jump是用了引号来表达拟人语气的，而do没有相应的符号来暗示这种语气，所以有ETS那样的解释；而AB中moving是一个现分结构，其实可以被看作形容词，这样就避免了动词语气的不明确。

至于强调动作还是名词，在看到A时我也有和你类似的想法，但是当能够表达动作的选项都错时，表达名词的选项就成为我们仅有的答案了。

请问moving在这里是定语还是补语呢

个人觉得不是定语

受益非浅