Complete the sentences with the words and phrases in the box. There are two extra words.

biologist   text messages   update   discovery    password   gravity   web browser   computer science   

Example: To use some mobile devices, you need to put in a password.

1. I don’t ____________ my profile very often because nothing has changed in my life.

2. There’s something wrong with the____________ I use and I can’t get online.

3. I never use my mobile to call people, but I send lots of____________.

4. He’s very interested in science so he went to university to become a____________.

5. In your opinion, what was the greatest____________of the twentieth century?