Would it be ______ for you to pick me up at four o’clock and take me to the airport?

------I’d like to book a round- trip ticket.------Sorry, sir, but there are no tickets______ at the moment.

Security cameras are restricted to ________ spaces，such as hallways and exits.There will be no cameras in classrooms，locker rooms(更衣室)or bathrooms.

----Will you be ________ this afternoon, Tom? ----It depends. I’m afraid I’ll be called in by my manager. 

I think he is _____ to win, but I'm not sure.