18 Match the beginnings and endings of these sentences. 1 The cloud of ash from the volcanic eruption blocked 2 If we don't change the way we live in the developed world, we're heading 3 Sometimes helicopters are used to put 4 Machines can now carry 5 Don't get stressed 6 If a meteorite hits the earth, it will probably wipe a out most living things. b out the sun. c out forest fires. d out about things which may never happen. e for disaster. Resheba.com f out many tasks that were once done by people.