The students be in the classroom because there are lights in it.
---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.