C)To help the residents in times of emergency
D)To enable the police to take prompt action
29 A)Popular
B)discouraging
C)effective
D)controversial
Passage Two
30 A)people differ greatly in their ability to communicate
B)there are numerous languages in existence
C)Most public languages are inherently vague
D)Big gaps exist between private and public languages
31 A)it is a sign of human intelligence
B)in improves with constant practice
C)it is something we are born with
D)it varies from person to person
32 A)how private languages are developed
B)how different languages are related
C)how people create their languages
D)how children learn to use language
Passage Three
33 A)she was a tailor
B)she was an engineer
C)she was an educator
D)she was a public speaker
34.
A)Basing them on science-fiction movies.
B) Including interesting examples in them
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