Although all of the apples _____, none of them _____ good。
Chinese becomes one of the world’s _____________________________ .
I don’t have to live in the hotel ____ my friend provides a very good place for me.
I find this Math problem very ______. I believe students can work it out ______.
animals are in danger and there will bespace for them if we don’t take any actions.
——The birdwatching is very boring, isn’t it? ——_____________ . I only see few birds.