Western nations have older and shrinking populations since they entered the 21st century and their f_____ birth rates have also posed problems.
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She didn't want to marry him and was p____ against him because he had only a bachelor's degree and didn't meet her expectations for marriage.
The president is in trouble and will have to work hard to r_____ his credibility after people discovered that he was not telling the truth.
To study a number of subjects in the humanities has been both enjoyable and e____, providing me with a new and different perspective on the world in which we live.
People are concerned about the enviroment issue because air and water pollution not only affects everyone's health but also makes it difficult for business to p____.