题目内容：

根据句意,用所给词的适当形式填空,每词只可用一次
所给词buy,lots of,not……until,open,work out,write down,it,by ear,at work,have 句子he is very happy because he has got___friends since he moved here .the children___leave this village___their teachers come here tomorrow morning.did you learn this music___ yes.i ofen listen to it who taught you___this problem everyone was___so there was no one to answer your call