3 Write a word from the box in each gap.
/ are . is• isn't• was • wasn't •weren't /
The mobile phone has been around since the 1970s, but the idea behind the text message (1)____ developed until the 1980s. Then, years later, the first text message (2)____ sent in the UK in 1992. When people started to use mobile phones, text messages (3)_____ used very often. Now, millions of text messages (4)____ sent every day. Information (5)____ written by using the numbers on the phone to make words. People like text messages because they're cheap. So, a lot of money (6)____spent to send them.​