GWD 27 30

ekinok

Q30:

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.

 

1. threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems

2. threat, after habitat loss, to native species of plants and animals and for maintaining biologically diverse ecosystems

3. threat, after losing their habitat, to native species of plants and animals and also to maintenance of biologically diverse ecosystems

4. threat to native species of plants and animals and for maintaining biologically diverse ecosystems, after habitat loss

5. threat to native species of plants and animals as well as to maintaining biologically diverse ecosystems, after losing their habitat

答案是A,我选的C,请问有什么不对的地方呀？

onopan

losing 表重复性动作，错！

且 habitat loss 是实义名词优于分词结构。