阅读下面短文，在空白处填入一个适当的词或填入括号中所给单词的正确形式。

    Hello! My name is Lin Min. My sister Lin Li is a teacher,  she isn't in Beijing with us. She works at a small  in Yushu in Qinghai. She（work） hard. After breakfast every morning, she goes to four of her students'（home） and brings them to school. They have lunch at school. During the lunch time, my sister tells （they） about family, friends, life and love. The students like to （listen） to her very much. After school, she takes the four students their homes. In the evening, my sister doesn't watch TV or play computer games. After dinner, she checks（检查）her students'（homework）. She goes to bed 22:00. My sister's life is all about her （student）. I think she is a great teacher!