The key to exercise solutions in chapter 2.3 - Who do you trust? for the textbook Speakout Advanced - Students' Book with authors Antonia Clare and J. J. Wilson from Pearson Education
Question
Answer
a)
Dr David Bailey says, 'I've got a real vested interest. To have a vested interest means you are not neutral because you have personal reasons for wanting things to be a particular way. Professor Justin Lewis says, We don't have an axe to grind', which means the opposite.
b)
c)
All of these can be used to introduce opinions or knowledge.