大学体验英语综合教程4课后习题答案[1]

9------4 + 16------1 An abundance of wildlife An ideal place Be threatened by Be endangered by To protect natural beauty from irresponsible development Balance economic growth with environmental protection They value quiet forests, clear streams and abundant wildlife. They are eager to help with conservation efforts. ……may or may not be the great environmental crisis of the 21st century. We will argue over it and may make some fairly solemn-sounding commitments to