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19. BELIEVE THE EYES
How do you know when someone is lying? Scientists studjãng the human
face with sensitive cameras may have discovered the answer, almost hy
accident. When someone in the laboratory dropped a book, (1 )______ a loud
noise, the camera they were using to study someone’s face showed an
unexpected (2) ______ . The sudden fear had caused the (3) ______ of the
person’s face around the eyes to change. This led the researchers to (4)
______the idea that if a super-sensitive camera could spot fear, it would be
quite (5 )__ ___of showing when people were (8 )_________ a lie.
The researchers then (7) up an experiment to test out their theory.
Some volunteers were told a secret which they were forbidden to (8 )______
with another set of volunteers, who were told to (9 )______ what it was. The
results were (1 0 )______ , with the camera correctly identifying which of the
volunteers was lying.
Some people believe that these tests could lead to the (11) ______ of a
camera which would (1 2 )______ airport security staíT who, at the moment,
have to (13) ______ on their own judgement when asking passengers about
the contents of their luggage. However, although the camera could be more
(14) ______ than traditional ways of discovering whether people are lying,
most scientists believe that more (1 5 )______tests are needed before it goes
into widespread use.

1. A. getting B. having c. making D. doing
2. A. reaction B. relation c. reply D. remau^k
3. A. example B. description c. variety D. appearance
4. A. get away with B. come up with c. look forward to D. stand up to
5. A. talented B. clever c. skilful D.capable
6. A. telling B.speaking c.saying D. talking
7. A. held B. put c. set D. gave
8. A. argue B. spill c. inform D. share
9. A. catch up B. find out c. ask after D. call for
10. A. famous B. 2imazed c. wondering D. impressive
11. A. innovation B. development c. growth D. increase
12. A. assist B. appeal c. attract D. accept
13. A. support B. rely c. lean D. rest
14. A. right B. correct c. accurate D. honest
15. A. convincing B. persuading c. proving D. agreeing

20. MIND OVER MUSCLES
If you’re lazy and not in good physical shape, then Dr Guang Yue, an
exercise physiologist, has come up with a theory that might be of (1 )______
to you. His (2) ______ discovery is that the strength of our muscles can be

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