五 . 语法填空 A research team has found __1__ oldest example of bread in the world. While on a dig in a country in Western Asia, researchers from the universities in Cambridge, Copenhagen and London found 24 ancient breadcrumbs( 面包屑 ) . The breadcrumbs were burnt, __2__ is how they survived for so long. The researchers analyzed the breadcrumbs and found they were __3__ (rough) 14,400 years old. This __4__ (discover) proved humans were making bread 4,000 years earlier than scientists thought. Researchers __5__ (date) the people who baked the bread at around 12,500 to 9,500 B . C. They were prehistoric __6__ (hunt) and gatherers and lived thousands of years before humans settled down to become farmers. The leading researcher said raw materials of the breadcrumbs were from various grain plants and the bread took a long time to make. Ancient Jordanians began by __7__ (process) grains to get fine flour. They then mixed the flour with water. After that, they baked the mixture on a hot stone. The bread looked like the flat pitta bread still __8__ (make)across the Middle East today. Another researcher said the bread could be one reason __9__ the agricultural revolution starting. Stone Age people realized it was __10__ (easy) and more convenient to farm the wheat for bread instead of collecting it from the wild.