How many hours does the boss make the workers __ a day?–About ten hours.

Why didn’t she ask for help at that time?— You know, at such a midnight, there was no one ________.

Will you stay for lunch?— Sorry, I ______. My brother is coming to see me.

Look, the set of keys _ _ on the teacher’s desk.

The boy is waiting for a bus ______ the bus stop.[ ]