Do you think your mobile phone is clean? In this science experiment, some British teenagers discover how dirty their phones really are. Watch the video and do the tasks.
https://youtu.be/EnKmNJYYR8Y
Choose the correct word or phrase to complete the sentence.
The presenter says that our mobile phones can be ______________
almost as dirty as a toilet seat.
dirtier than a toilet seat.
dirty if we use them in the toilet.
