The children went home from the grammar school, their lessons __________ for the day.
— Excuse me.Is this the right way to the Summer Palace?— Sorry, I am not sure.But it ______ be.
— Do you want tea or coffee? — ______.I really don’t mind.
Finally they arrived at a place _____ sold cigarettes and some other bargains.
Don’t be worried about his safety.______, he is an eighteen-year-old young man.
More bison were killed.The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.