Unit 3 ... I went snorkelling on the reef offshore this morning. ... Seeing such 小题1: , I think every cell in my body woke up. ... The first thing I 小题2: was all the vivid colours surrounding me—purples, reds, oranges, yellows, blues and greens. ... Unit 5 Six months ago Xie Lei said goodbye to her family and friends in China and 小题3: London. It was the first time 小题4: her motherland. ... Lesson 23 People become quite 小题5: when they try to decide what can be eaten and what cannot be eaten. If you lived in the Mediterranean, for instance, you would consider octopus 小题6: . You would not be able to understand why some people 小题7: . ... Lesson 27 It has been said that everyone lives by selling something. 小题8: this statement, teachers live by selling knowledge, ... Though it may be possible to measure the value of material goods 小题9: money, it is extremely difficult to 小题10: of the services which people perform for us. ... yet we might grudge paying a surgeon a high fee for offering us precisely this service.