(
课件网) Unit 2 Taken for a Ride Lesson 4 Key Structures Express Preferences Why are you buying ___ Why not ___ I prefer ___. Grammar Surprising Actions Why on earth is she ___ I expect she likes it. Grammar Verbs for "Always Happen" Never use -ing! Belong to / Contain / Need / Hate... I'm hating this → I hate this Lose vs Loose vs Miss miss Lose vs Loose vs Miss loose Lose vs Loose vs Miss lose Lose vs Loose vs Miss Miss the bus, Lose keys, Loose tooth! It takes/took... I do... in + (time) → It takes me + (time) to do... 写书：0% → 6个月 → 100% → It took him 6 months to write Spun gold A unique golden silk cloth has just gone on show at the Museum of Natural History in New York. Weighing nearly nineteen kilos, it measures 335cm by 122cm. Its design is like the finest silk-weaving designs from ancient China, but this cloth is neither Chinese nor ancient. Created from natural spider silk by Simon Peers and Nicholas Godley, this is the only large spider-silk cloth in the world. Spun gold The silk for this cloth was collected from female 'Golden orb' spiders in Madagascar, over a period of about four years. While seventy people collected spiders from the wild, twelve more drew off the silk filaments from each spider, and spun the filaments into threads. The filament from one spider can be as long as 25 metres, but a single thread for weaving consists of 96 filaments. Thus one spider produces no more than 26 centimetres of fine silk thread at a time. Spun gold Spider silk possesses unique qualities. Although it is five times stronger than steel, it stretches to almost half its length again before breaking. Scientists know that spider silk would have thousands of uses in medicine and engineering, if only they could farm it. The trouble is that spiders are impossible to farm, because they eat one another. Researchers have not yet succeeded in creating spider silk without spiders, but they expect to do so soon. Thank you!
