1. 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.

2. Mr O’Callahan’s gadget can count bugs because it …
measures a chemical produced by the bugs.
has a microscope to see very small bugs.
has a special light to see very small bugs.

3. A mobile phone which receives a score of 150 would be considered …
clean.
a little dirty.
very dirty.

4. Mr O’Callahan says that bugs are …
always dangerous.
not always dangerous.
more dangerous in hot weather

5. The presenter says that maybe the gadget is broken because …
the results are incredible.
the results are confusing.
the gadget is making a strange noise.

6. The results showed that all the pupils’ phones were …
clean.
a little dirty.
very dirty.

7. The presenter wins the challenge against Mr O’Callahan because …
her phone is cleaner.
her phone is dirtier.
her phone has a score lower than 100.

8. At the end, the presenter and Mr O’Callahan say that they will …
clean their phones.
buy new phones.
change the way they use their phones.