Researchers in Australia and the US are working on a project to bring the thylacine（袋狼） back from extinction，the last one of which died in the 1930s.
The team say it can be recreated using stem cells and gene-editing technology，and the first thylacine could be reintroduced to the wild in 10 years' time.The group of Australian and US scientists plan to take stem cells from a living marsupial（有袋動(dòng)物） species with similar DNA，and then use gene-editing technology to"bring back"the extinct species or an extremely similar one.It would represent a remarkable achievement Yor the researchers attempting it，and require a number of scientific breakthroughs."I now believe that in 10 years' time we could have our first living baby thylacine since they were hunted to extinction close to a century ago，"said Professor Andrew Pask，who is leading the research from the University of Melbourne.
The population of thylacine declined when humans arrived in Australia tens of thousands of years ago，and again when dingoes，a species of wild dog，appeared.Eventually，the thylacine could only be found on the island of Tasmania.and was ultimately hunted to extinction.
The idea of bringing back the thylacine has been around for more than 20 years.In 1999，the Australian Museum started to pursue a project to clone the animal；and various attempts have been made ever since to gain or rebuild DNA from samples，which is capable of surviving and developing.
This latest project is a partnership between University of Melbourne and Texas-based company Colossal，which made headlines last year with its plans to use similar gene editing technology to bring mammoth（猛犸象） back to life-a technology yet to become reality.
Many outside experts are rather
dubious about the science behind it，suggesting de-extinction（物種復(fù)活） is just science fiction.But if scientists were to succeed in bringing back the thylacine，it would mark the first "de-extinction"event in history.
（1）What can be inferred from the first two paragraphs？
C
C
A．The thylacine became extinct a decade ago.
B．Scientists will take stem cell from a thylacine.
C．Gene-editing technology is needed to recreate the thylacine.
D．The thylacine can be recreated with the existing technologies.
（2）The Inst thylacine was seen
C
C
.
A．in Tasmania
B．in Texas
C．in Melbourne
D．in the Australian Museum
（3）What does the underlined word"dublous"in the last paragraph mean？
B
B
A．Worried.
B．Doubtful.
C．Confident.
D．Ambitious.
