Lesson 4 An exciting trip 激动人心的旅行课文内容：I have just received a letter from my brother, Tim. He is in Australia. He has been there for six months. Tim is an engineer. He is working for a big firm and he has already visited a great number of different places in Australia. He has just bought an Australian car and has gone to Alice Springs, a small town in the centre of Australia. He will soon visit Darwin From there, he will fly to Perth. My brother has never been abroad before, so he is finding
