Writing: Complete the sentences with the words: affect, requires, patenting, inventor, mechanical, signal, invention, electricity. 1) Nobody believed that this ________ could create something really outstanding. 2) Scientists are investigating the ways in which climate changes _______ the ozone. 3) If you are worried about ________ bills, turn the monitor off at the end of the day. 4) The job ______ a college degree and computer literacy. 5) The sound ________ was so weak that he could hardly recognise it. 6) Cox earned millions by _______ a device used in steel production. 7) Every woman agrees that a dishwasher is a wonderful ___________ . 8) The plane had to make an emergency landing because of ________ problems.

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