There are emergency exits in both towers of the hotel, ______ on the other side opposite the elevators.

Are they talking—____

______ nearly all behavior is learned behavioris a basic assumption ______ has been put forward by the social scientists.

下列选项中的诗句填入《诮燕》一诗画横线处，恰当的一项是（ ）风雨池塘斗颉颃，春来秋去一生忙。 ，辛苦营巢傍屋梁。

The researchers have discovered __________they believe to be a new species.