Maryisahighschoolstudent,whodevotedherselftoherlessonse...
问题详情：Maryisahighschoolstudent,whodevotedherselftoherlessonseveryday.LastSaturday,asusual,shewenttoseveralclass.Intheevening,shecontinuedtostudyuntildeeplyintonight.Shewastoosleepyandtiredthatshecou...