* antelopes are in danger now .Only hundreds of them ___today.Protecting them is important.

问题描述:

* antelopes are in danger now .Only hundreds of them ___today.Protecting them is important.
A remain C keep 我知道是选A,B为什么不对,

KEEP是主动词,且是及物动词,REMAIN有剩下,留下的意思,不是为谁主动KEEP(留下)而是残留REMAIN(被动的剩下)所以用A