We haven’t seen each other for ages．—No, I don’t remember how many years ago _______ I last saw you．

His pale face suggested that he ______ ill andthe teacher suggested that he _______ the doctor

We should try every way to develop education, it means slowing down in other fields

There _____a very small number of books on science in our school library, and in these years the number of them growing larger and larger.

He hurried to theairport and got _______ the plane just in time