He seems a(n) _________ person. He always has a lot of things to do.
Don’t waste your time in your holiday. Try to find _______ useful to do.
As the _______ grows larger, the world itself seems to be smaller.
--- Will Jim go hiking with us this weekend? --- Maybe not. He _______ to visit his grandpa in the country.
There’s still an hour left, you _____ go in a hurry.
---Have you seen Bill recently? --- Oh, no! Nobody knows ______ he is! Everyone is looking for him.