1. Did you break this lock? (that lock) 2. Did you find a textbook? (a map) 3. Did you get a good mark? (a bad mark) 4. Did you wear jeans? (shorts) 5. Did you make tea? (coffee) 6. Did you speak Russian? (English) 7 . Did you tell a lie? (the truth) 8. Did you hear his voice? (her voice) 9 . Did you take two tickets? (three tickets) 10. Did you see a tiger? (a giraffe)

Locks have been securing valuables for thousands of years, dating back to ancient Egypt where wooden pin locks were used. Fast forward to today, and locks have evolved into complex mechanisms that provide us with safety and peace of mind. So next time you fiddle with a lock, remember you’re engaging with a technology that has stood the test of time! When it comes to textbooks, they have played a vital role in education throughout history. The invention of the printing press made textbooks widely available, sparking a knowledge revolution! Today, you can find digital textbooks, interactive e-books, and a plethora of online resources, making learning more accessible than ever. So whether you're flipping through pages or scrolling on a screen, education is at your fingertips!