用方框中所给单词的适当形式填空，每词仅用一次（每空一词）。
real pleasure pioneer invent daily |
Paul: Hey, Jenny, the subject for my school project is "Small invention that changed the world". Can you help me think of an invention?
Jenny: With ____! Let me think ... hmm ... I know! The zipper!
Paul: The zipper? Is it ____ such a great invention?
Jenny: Think about how often it's used in our ____ lives. You can see zippers on dresses, trousers, shoes, bags ... almost everywhere! I saw a website last week. The ____ of different inventions were listed there. For example, it mentioned that the zipper was ____ by Whitcomb Judson in 1893. But at that time, it wasn't used widely.
Paul: So when did it become popular?
Jenny: Around 1917.
