What happened to the heroes at the end of the book?— All of them _____ escape from the enemy’s prison and began their new life. [ ]

I don’t know __________ or not the work will be completed on time .

How many states _______ the United StatesFifty.

Xi’an is a city with many places of interest and _____ tourists come here every year.

－Are your parents angry with you about your English－Oh, of them is angry. They just told me to get better grades next time.