阅读理解。
My name is Nicky. I've been a travel writer for twenty years now. It's a really interesting life. I was
only twenty-one when I started traveling. The first country I went to was Mexico. At first, I studied
Spanish for six months in Mexico City. Then I traveled to other parts of Mexico, and all over South
America. My favorite country was Peru. It has everything-great beaches, tall mountains, and forests
with lots of strange and wonderful animals. Brazil is the only South American country I've never visited,
but I'm a great fan of their football team! I hope to watch a football match in Brazil one day.
What other countries have I been to? Well, I've been to most parts of Asia. I spent three years in
China, and I lived in India for five years. However, I've never been to Japan. My friends tell me it's
really expensive there. I like to spend my time in cheaper countries. At the moment, I'm living in Vietnam.
It's a beautiful country, and the people are very friendly. I've been living here for two years now, and I
love it!
根据短文内容，回答下列问题。
1. Why does Nicky like being a travel writer?
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2. How long did Nicky spend in Mexico City?
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3. Which part of South America has Nicky never been to?
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4. Why has Nicky never been to Japan?
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5. Why does Nicky like to live in Vietnam?
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