What the teacher said in class set all the _____ a lot. 

   As we know, the coming of radio in this century made ocean sailing much ______.

My daughter cares more for new clothes than anything else in the world, so she is very _______ about what she wears.

Compared with other animals, snakes are believed to be below ____ in intelligence.

 We do hope that one day the Chinese language will become a __________ language, that is, everyone in the world will communicate in it.