I don’t know who invented ________ telephone. It’s really ________ most useful invention.
How long do you think ___________ the Microsoft brings out a new product?
We all thought ______ a question ________we could raise enough money for the project.
—He got his first book published. It turned out to be a bestseller. —When was _____? —_____ was in 2000 when he was still in college.
He didn’t make ________ clear when and where the meeting would be held. .
—There is still a copy of the book in the library. Wall you go and bottow ?—No, I’d rather buy in the bookstore.