27.well 井 28.become of+adj. 29.provide sb. with sth.30.strip off 剥去,剥下 31.make sth. into. sth. 使成为 32.either or 这个或那个 33.from ancient times=for a long time=a long time ago 从古至今 34.certain 某一类 某一种 35.refer to 提及,提到,参考,查阅 36.lead to 导致 37. make profits 创造利润 38.recover 恢复