Our teacher is coming, please stop __________and keep __________.
---You should your teacher’s advice if you want to improve your science.---That sounds great.
--- Is he still raising money for charity?---Yes. He never _______hope of helping poor children.
---Why are you still here? It's so late.---Because I my work. Don't worry. It's almost done.
---Do you think yesterday’s math problem was difficult?---Yes. I could work it out.
--- A second-hand computer is much than a new one.---That’s true, but I’d like a new one.