简述写作教学中“范文”的作用．并说明范文在教学中的使用步骤及每个步骤的教学目标。

未分类题According to Noam Chomsky， human beings are born with an innate ability to acquire and produce language known as __________.

未分类题The phenomenon of may be the factor to cause the fewest changes in the English language in recent years.

未分类题请阅读Passaqe l，完成第21～25小题。Passage 1

未分类题请阅读Passage l，完成第21—25小题。Passage 1Move over Methuselah. Future generations could be living well into their second century and still doing Sudoku， if life expectancy predictions are true. Increasing by two years every decade，they show no signs of flattening out. Average lifespan worldwide is already double what it was 200 years ago. Since the 1980s， experts thought the increase in life expectancy would slow down and then stop， but forecasters have repeatedly been proved wrong.The reason behind the steady rise in life expectancy is 'the decline in the death rate of the elderly'， says Professor Tom Kirkwood from Newcastle University. He maintains that our bodies are evolving to maintain and repair themselves better and our genes are investing in this process to put off the damage which will eventually lead to death. As a result， there is no ceiling imposed by the realities of the ageing process. 'There is no use-by-date when we age. Ageing is not a fixed biological process，' Tom says.

未分类题The underlined phrase 'con job' in Paragraph 4 means__________. 查看材料