Mr. Flowers stayed ior near by his glass-houses______. · at times wheschool-boys were walking near them · all the school day whethere were no boys about · where he could not be seeby the boys passing · ihis free time at the beginning and end of the school day
答案是:单选题 ·win a silver cup for growing a rose of a new color · in his free time at the beginning and end of the school day