What do you think of physics— I think it’s ______ of all subjects.

I thought we’d be late for the concert, _____ we ended up getting there ahead of time[ ]

I won’t tell the student the answer to the mathproblem until he on it for more thanan hour

Mary heard somebody call her, soshe turned _______to see who it was..

John received an invitation to dinner, but with his work ____,he couldn’t go.