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1. John is twelve years old. Jane is ten years old,"and"Mary is eleven. Who is the oldest?
2. Eric is taller than Lin Lin. Lin Lin is taller than Amy. Who is the tallest?
3. The blue shirt is 15 yuan. The red shirt is 10 yuan. The yellow shirt is 11 yuan. Which is the cheapest?
4. English is difficult for me. Chinese is more difficult than English. Maths is even more difficult than Chinese. Which subject is the most difficult?