填词完成句子,首字母已给出。 1. L_____ Sunday I went to visit my uncle. 2. Li Ping is studying for the math t_____. 3. The math problem is a l_____ difficult. I can't work it out. 4. The teacher told me to s_____ at school, because I talked in class. 5. He is thirteen. He is a m_____ school student.