4 Fill in: come up with, throw away, switch off, turn down, put on, cut down on. 1 Make sure you........... all the lights before you leave. 2 You should ........... a jumper rather than turn the heating on. 3 Don’t........... those glass bottles. They can be recycled. 4 We must try to ........... the amount of electricity we use. 5 I like to...........the heating at night. It helps me to sleep better. 6 We must...........a way to use less paper.