【正确答案】：
MATILDA HAD BEEN ILL FOR THREE DAYS. HER MOTHER HAD GIVEN HER SOME MEDICINE, BUT IT DIDN'T DO ANY GOOD. SO THEY HAD TO ASK THE DOCTOR TO COME. 
【题目解析】：考点：病了三天：had been ill for three days；不见好：notdo any good；请来了医生：ask the doctor to come。句子结构：简单句+并列句，并列连词but意思为“但是”，表示转折关系。
