31. Choose the correct preposition: We know a lot about how the human brain responds
to fear.
32. Choose the correct preposition: There are very few behaviours that are unique
to human beings.
33. Choose the correct preposition: New evidence has cast doubt
on a respected scientific theory.
34. Choose the correct preposition: Different colours have different emotions associated
with them.
35. Choose the correct preposition: Timur carried out research
on rosehip neurons.
