Writing: Complete the sentences with the words: affect, requires, patenting, inventor, mechanical, signal, invention, electricity


1) Nobody believed that this ________ could create something realy 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.