Super realistic masks are made from flexible materials such as silicone and are designed to imitate real human faces—down to every last detail.

In a study by the Universities of York and Kyoto, researchers asked participants to look at pairs of photographs and decide which showed a【C1】________face and which showed a person wearing a mask.

Surprisingly, participants made the wrong call in one-in-five cases.

The 20% error rate【C2】_____in the study likely underestimates the extent to which people would struggle to tell an【C3】_____face from the real thing outside of the lab.

The researchers collected data from participants from both the UK and Japan to【C4】_____any differences according to race. When trial participants were asked to choose between photographs of faces of a different race from theirs, response times were slower and selections were 5% less【C5】_____.

There are now dozens of criminal cases in which offenders have【C6】________themselves off as people of a different age, race or gender, sending police investigations down the wrong path.

In one recent case, an international gang used an【C7】_____realistic mask to pose as a French minister,【C8】_____business executives out of millions of pounds.

Dr Jet Sanders, who worked on the study while a PhD student at the University of York, said.-“Failure to detect synthetic faces may have important implications for security and crime prevention as super realistic masks may【C9】_____the key characteristics of a person’s appearance to be【C10】_____identified.”

A) accurate I) incorrectly

B) allow J) normal

C) artificial K) observed

D) cheating L) passed

E) deserted M) reminding

F) establish N) reparable

G) extremely O) resolve

H) immediately

【C5】