单项选择题 As a result of scientific intervention (介入) ,some harmful substances have been added to our food.
单项选择题 The author of the passage could not go to sleep partly because()
填空题 Paragraph 2______ A.The Invention of the Fridge B.The Pollution Caused by Fridges C.The Widespread Need for Fridges D.The Days without the Fridge E.The waste of Energy Caused by FridgesF.The Fridge’s Contribution to Commerce