精品文档---下载后可任意编辑Unit51
strong police force has been placed between the two (rival) groupsin the village to prevent fighting and killing
Although personally we believe this to be of only secondary importance, its potential role in (motivating) innovative acts cannot be ignored
Western nations have older and shrinking populations since they entered the 21st century and their(fluctuating) birth rates have also posed problems
The president is in trouble and will have to work hard to (restore) hiscredibility after people discovered that he was not telling the truth
To study a number of subjects in the humanities has been both enjoyableand (enlightening) , providing me with a new and different perspective on the world in which we live
People are concerned about the environm