I won’t tell the student the answer to the math problem until he ____on it for more than an hour

You’ll have to book a ticket ________ if you want to see that show.[ ]

Tom took the police to the spot ________ the accident happened.

Every evening after dinner, if not_____ from work, I will spend some time walking my dog [ ]

The Grand Theatre islocatedon the cornerof _________ is called the People’s Square