unit6 words in use Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once. enlighten    discard       restore       fluctuate     prejudice        profit        rival          motivate implement           investigate 1 When employees participated in the problem-solving process, they were much more willing to____  solutions to the problems. 2 A strong police force has been placed between the two _______ groups in the village to prevent fighting and killing. 3 Although personally we believe this to be of only secondary importance, its potential role in________ innovative acts cannot be ignored. 4 Though many things have been changed culturally, there is a commitment and sense of responsibility that have not yet been__________   in today's society. 5 Western nations have older and shrinking populations since they entered the 21st century and their_____  birth rates have also posed problems. 6 She didn't want to marry him and was_______   against him because he had only a bachelor's degree and didn't meet her expectations for marriage. 7 The president is in trouble and will have to work hard to_______  his credibility after people discovered that he was not telling the truth. 8 To study a number of subjects in the humanities has been both enjoyable and_______   , providing me with a new and different perspective on the world in which we live. 9 People are concerned about the environment issue because air and water pollution not only affects everyone's health but also makes it difficult for businesses to_________  . 10 Instead of ignoring or envying successful students, I made it my mission to___________   the mysterious causes of their success and greatness.