Fill in the blanks to complete the following passage according to your understanding of text A.Travel is ____1_______ and sometimes even unpleasant; then what is the driving force behind our travel? We travel because we need to. Sometimes our travel is a __2__ because we should attend the business luncheon, because we should celebrate Thanksgiving with our mom. We travel because we want to.Owing to the fact that most travel is __3_____, we just travel following our heart. Most people travel for the sake of _____4_____, but their mind tends to solve the stubborn _____5______ issues while on vacation. What is the real purpose of travel? Travelling to a new place can make us less controlled by familiar cognitive ____6____ that imprison us. As a result, we can better combine the new with the old, the mundane is ____7____ from a slightly more abstract perspective.To _____8_____ travelers, multicultural contrast means that they are open to ambiguity and willing to see the world in different ways, thus to expand the _______9_______ of their “cognitive inputs” as they refuse to ____10______ their first answers and initial guesses. Of course, that mental flexibility is a side effect of difference and we know what we did not know in the past, by which we become more open-minded and less ___11____.Apart from its advantages, travel also has it ____12_____, which make us not take great pleasantness. More often than not, we need a ____13_____ after our vacation. We travel because we need to , because distance and difference are the ______14_______ of creativity. Travel will change our mind to some extent, which in turn can have ____15____ on everything in our life.