1. (2023高二下·乌鲁木齐月考) Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.

A. artificial  B. reflect C. remains D. accidentally E. overtaken F. recover G. disappearance  H. functionally   I. scheme  J. adaptations  K. preserved

A Mammoth ProjectA US company called Colossal has raised 11 million dollars to bring mammoths (猛犸象) back from extinction. Mammoths died out about 3,700 years ago but their bodies are sometimes in ice. This allows scientists to their DNA, which could hold the key to bringing mammoths back to life.

A team of scientists at Colossal plan to use information from mammoth to edit the DNA of Asian elephants — their closest living relatives. The team will focus on DNA that is linked to bushy hair and other for cold weather. These were what helped mammoths survive on the Arctic steppe — ancient chilly grasslands. By adding this DNA to egg cells from Asian elephants, they hope to create an elephant-mammoth mix, which could develop into a baby either inside a living Indian elephant or in a(n) organ.

Colossal hopes that the first set of calves could be born this way in six years. "We want something that is equivalent to the mammoth, that will enjoy its time at - 40℃ and do all the things that elephants and mammoths do, in particular knocking down trees," said Church, the founder of Colossal. It's hoped that the destructive habits of the hybrids (杂交种) could help restore areas of Arctic steppe that have been by trees since mammoths became extinct. That can help keep the world cooler.

Arctic grasslands more heat from the Sun than forests and can absorb more of the gases released by human activity. However, not everyone agrees with the . Professor Adrian says the extinction of mammoths had little to do with the of steppe grasslands. He points out that it would take thousands of mammoths to have an effect on the environment.