剑桥雅思15Test3Part4听力答案解析 Early history of keeping clean
剑桥雅思15 Test3 Part4听力答案解析
对应原文：the earliest people lived near water and knew something about its cleansing properties – at least that it rinsed mud off their hands.
答案解析：从题目可以推测出空上应该填某种脏东西。听到water意识到答案即将到来，rinsed off与wash off同义替换，根据修饰关系或者含义均可确定mud为正确答案。
对应原文：soapmaking was known as early as 2800 BC. Archaeologists discovered cylinders made of clay
对应原文：Instead, they cleaned their bodies with blocks of sand, pumice and ashes, then anointed themselves with oil, and scraped off the oil and dirt with a metal instrument known as a strigil
对应原文：discovering how to make a substance called ‘soap’, made of melted animal fat and ashes. They used this mixture to tint their hair red.
对应原文：As Roman civilisation advanced, so did bathing. The first of the famous Roman baths, supplied with water from their aqueducts, was built around 312 BC
对应原文：This lack of personal cleanliness and related unsanitary living conditions were major factors in the outbreaks of disease in the Middle Ages
对应原文： Vegetable and animal oils were used with ashes of plants, along with perfume, apparently for the first time.
答案解析：一些同学可能会认为前面的vegetable, animal oils或者ashes也可以作为答案。但它们制成的是肥皂本身，而不是添加物。
对应原文：a French chemist, Nicholas Leblanc, patented a process for turning salt into soda ash, or sodium carbonate.
对应原文：His studies established the basis for both fat and soap chemistry, and soapmaking became a science
对应原文： it became an everyday necessity, a development that was reinforced when the high tax was removed.