我叫mt装备进化材料:I usually ( )two music classes a week .But last week we () one

I usually ( )two music classes a week .But last week we () one which two are usually women:alto, soprano, tenor, bass? 如何理解:We usually have a break between every two lessons I HAVE TWO QUESTIONS ABOUT ENGLISH！ I have range and two horses saturdays I worked from two until eleven saturdays I worked from two until eleven I spend two hours___my homework every day . We usually have a break between every two lessons.这句话应如何进行句型同义转换 改错I hear we well have a( two days) holiday in( two days )time