GWD剩两个怎么比？谢谢！

sierrapan

According to some botanists, invasive plants are the second most serious threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems.  
 threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems  
 
 threat, after habitat loss, to native species of plants and animals and for maintaining biologically diverse ecosystems  
 
 threat, after losing their habitat, to native species of plants and animals and also to maintenance of biologically diverse ecosystems  
 
 threat to native species of plants and animals and for maintaining biologically diverse ecosystems, after habitat loss  
 
 threat to native species of plants and animals as well as to maintaining biologically diverse ecosystems, after losing their habitat  
A&C
答案是A

moonlolita

C意思不对吧？after losing their habitat，原句是“ip是仅次于habitat loss的threat”,C变成了“在动物们失去了HABITAT以后……”

lorrain_cc

且and also是不是有点多余了~

lorrain_cc

我觉得C,losing的逻辑主语就变成ip了