Topic 1: Increasing travels between countries enable people to learn different cultures or to increase tension between people from different countries

Rapid 
+ 
change,  decline,  development,  expansion,  growth,  improvement, 
increase, pace, rate, reaction, response, rise, spread, transit
 
113.
 
Rare 
+ 
animal,  book,  case,  event,  example,  exception,  instance,  moment, 

---

 
139 
occasion, occurrence, opportunity, sight, species
 
114.
 
Regular 
+ 
basis, check, customer, exercise, interval, job, service, use, visitor, work
 
115.
 
Relevant 
+ 
data,  document,  experience,  fact,  factor,  information,  material, 
qualification
 
116.
 
Reliable 
+ 
data, estimate, evidence, guide, indicator, information, means, measure, 
method, result, source, way