—Are you satisfied with what he did？　　—No， it couldn’t have been ______.

It has been proved by the fact that watching violence on TV may cause children’s _____ behavior.

In business negotiation, an _______ attitude may result in breaking the relationship with our partner while a too frank communication may bring a company into an unfavorable situation. 

-- Our trip to Xinjiang is like tasting a thick book of Xinjiang history and culture.--- Absolutely! I’ve never had        one before.

My elder brother wants to buy a _ computer, so that he can carry it around when he travels.