People should _____ from throwing the rubbish everywhere .
He spends as much time as he can ____ English every day.
---Why does Tommy look unhappy ? --- Because his teacher makes him _______ the classroom all by himself .
--- I’d like to buy a skirt like this. --- OK. We can buy ________ one than this, but ________ this.
--- I have _____________, I’m afraid I have to see the doctor. --- I ‘m sorry to hear that.
--- How tall the boy is! --- Yes, he is taller than __________ in his class.