―Do you know where David is? I couldn’t find him anywhere.―Well. He ______ have gone far — his coat’s still here.
Great changes ______ in the city, and a lot of factories ______.
According to the record reports, one of the rare animals, ______ crocodile, is in ______ danger of dying out.
______, ______ many boys, Jack like playing football.
This is the ____ piano on which the composer created some of his greatest works.
Perhaps we need to clear away these books to make ______ for our new students.