The development of industry has been ____gradual process throughout _____ human existence, from stone tools to modern technology.
—Did you see a man in black pass by just now? —No, sir. I ______ a newspaper.
Only by working hard can you ______ the goal.
—Did you have ________ fun at the party?—Yes. It’s ________ shame that you missed it.
I don’t allow you ________ so high a mountain.
The old man was telling a funny story, surrounded by many kids, _________ with fascination.