They must stay at the cages ,so they can't be____
问题描述:
They must stay at the cages ,so they can't be____
答
They must stay at the cages, so they can't be ______ .
译文:他们必须呆在笼子里,所以他们不可能会快乐的.
应填:happy(心情愉悦的;高兴的)