4 Complete the sentences with modifiers. 1 This solar heater turns itself on and off automatically – it's quite unusual. 2 This mouse costs €200 – that's r__ y expensive! 3 My mum has a new travel DVD player for the car useful. 4 That fan doesn't work very well – it's k___0 old-fashioned. 5 The heater isn't working - the classroom is m t__ cold. 6 I can't do this exercise - it's t impossible!