As we all know, independence is very ________ for youngsters because sooner or later they will leave their families and live alone. 

(2009安徽合肥质检)Having failed in many attempts，the bird       managed to escape from the cage．

— The weather isn’t good enough for an outing, is it? — Not in the least. We can’t have __________ at this time of the year.

It seems ________ to our modern world, where everything is a rush and we try to cram as much into every minute as possible, but if not busy, we feel unproductive and lazy.

After his journey from abroad , Richard Jones returned home, _____.