58. The period in which man learnt to make tools of iron is called the Iron Age.
　　人类学会用铁制造工具的时代称为铁器时代。
　　59. I haven't seen you for ages.
　　我好久没见到你了。
　　60. Anxiety ages us.
　　忧虑催人老。
　　61. He came here two years ago.
　　他两年前来到这里。
　　62. I thought it was a reasonable proposal, but he didn't agree.
　　我觉得这是个合理的建议，但他不同意。
　　63. We agreed to leave at once.
　　我们同意立即离开。
　　64. The witnesses' statements just don't agree with each other.
　　几个证人的陈述并不一致。
　　65. A dictionary is an invaluable aid in learning a new language.
　　在学习一种新语言时，词典是非常有用的工具。
　　66. We were greatly aided in our investigation by the cooperation of the police.
　　我们在调查的过程中得到警方的大力协助。