Peter tried on three jackets, but _______ of them fitted him.
---If we take environment problems seriously, the earth worse and worse.---I agree.
I’m good at English,and I want to learn ____ foreign language.
---When will you start school?---I’m not quite sure. Maybe three weeks.
It’s possible_____ the old. We should often do so.
---There are APPs on mobile phones.---Yes. They make life easier and more interesting.