【正确答案】[范文]
   The 15th National Book Fair was declared open in Tianjin on May 18th, 2014. On that day, more than 60,000 people, such as teachers, students and workers, came to the fair from all over the country. Various activities were organized, including the opening ceremony, lectures on popular science, and meetings at which writers and readers communicated face to face. People went around to look for their favorite books. Among the most popular were books about social sciences, children's books and books about foreign language learning.
   The book fair brings to the book lovers much convenience as it can provide such a great variety of books. It satisfies people's need to increase their knowledge.