— There'ssomeone knocking on the door. Who _____it be?— It must be Mary. She promised to be here at 8:00.
If you turn your bag __________, the books will fall out.
They failed several times, and they finally __________ the hope of finding an effective way of solving the problem.
Eliza remembers everything exactly as if it __________ yesterday.
All the teachers are against the idea to __________ the new teaching building beside the sports ground.
I am so busy that I have __________ unanswered letters.