一种没有搞清楚的平行关系

3. GWD30-Q3:

Like ants, termites have an elaborate social structure in which a few individuals reproduce and the rest are serving the colony by tending juveniles, gathering food, building the nest, or they battle intruders.

1. are serving the colony by tending juveniles, gathering food, building the nest, or they battle

2. are serving the colony in that they tend juveniles, gather food, build the nest, or battle

3. serve the colony, tending juveniles, gathering food, building the nest, or by battling

4. serve the colony by tending juveniles, gathering food, by building the nest, or by battling

5. serve the colony by tending juveniles, gathering food, building the nest, or battling

如果补齐了by 后对吗？

不是不能随便省略介词吗？？？？

(A) Leakey contributed to archaeology with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting  平行，
                

(B) Leakey contributed to archaeology by her discovery of the earliest direct evidence of hominid activity and by painstakingly documenting  平行
                

(C) Leakey was a contributor to archaeology with her discovery of the earliest direct evidence of hominid activity and with her painstaking documentation of

(D) Leakey's contributions to archaeology include her discovery of the earliest direct evidence of hominid activity and her painstaking documentation of

(E) Leakey's contributions to archaeology include discovering the earliest direct evidence of hominid activity and painstaking documentation of  平行

答案D

问题同上，如果B中 都是平行的，但是把BY补全了，还对吗？

第二个问题，D中的leaky这个人实在所有格中出现的，那么后面的那个her还有指代吗？

不是不能表示所有格中的指代吗？

谢谢！！！！

个人观点：

or 后面一定要加，才能符合原文的意思，一类是搞家政的（照顾少幼，采集食物，筑巢），一类是打仗。其他地方加与不加都可以