It's thursday afternoon, half past one. alan and david are leaving school. they are going to the sports ground to play tennis. in the street they meet sarah and invite her to join them. sarah - hi, boys! where are you going? david - now home, and then to the sports ground. we are going to play tennis. why don't you join us? sarah - i would love to, but i can't. i must study and learn a poem by heart. alan - can't you do it later? we will get back at six or at half past six. sarah - i don't think i can. i am having music tomorrow too and i am not ready with my song yet. david - what are you singing? sarah - we are singin yesterday. the music is beautiful, but it is difficult. david - oh, no. you won't be at home all the evening, will you? sarah - i will, but that will be a busy evening. so bye boys! i will play tennis with you next week. alan and david - so long, sarah. see you on monday. say about sarah's problems at school