why do some of whales have to_?because their number is getting sm_英语解答

why do some of whales have to_?because their number is getting smaller and smaller.
why do some of whales have to_?
because their number is getting smaller and smaller.
a.protect b.protected c.be protected d.be protect

人气：414 ℃　时间：2019-10-17 07:28:23

解答

c.be protected.
为什么鲸鱼要被保护?被动,be protected