GWD－30－Q2

2. GWD30-Q2:

Caribou are wary animals with excellent hearing, so stalking them over the treeless landscape, getting close enough to kill it with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill. 

1. so stalking them over the treeless landscape, getting close enough to kill it
           
2. so to stalk them over the treeless landscape and get close enough to kill one
           
3. so in order to stalk them over the treeless landscape and get close enough to kill one
           
4. and so in order to stalk it over the treeless landscape, getting close enough to kill it
           
5. and so stalking them over the treeless landscape and getting close enough in order to kill it（B）

我最不明白的，就是为什么B里面第一个短语用to开始，而后面那个get close enough却没有to,难道这样不违反平行结构原则吗？而且，为什么只有不定式才能领导这个结构，分词结构就不行呢？

自己顶

不是说分词结构不可以，to do 优于 doing

而且这里的doing明显是不对的，没有用and连接

to可以省略

THANKS