Last week our music teacher taught us a song,named Tndebted Heart这个句子中named 前面为什么要用逗号,是一个句型吗

Jim joined a_____(music)club last week. Last week our class did a(an)__of what music the young people like listening to A reportBresearchC surveyD exam A few American______visit our school last week Last week our music teacher taught us a song,named Tndebted Heart这个句子中named 前面为什么要用逗号,是一个句型吗 she joined the music club last week 用现在完成时改写 last week,in last week有什麽区别?原题是这样的：we returned to our hometown last week (2/2)ting _ our school last week. last week we visited our aunt.谁知道啊 11111 we,last,our,visvitde,aunt,week连词成句 Last week a group of ____ visited our school (canada) Do you know the results __ our exam last week? several _____(foreigner) came to vidit our school last week. last week last.week 把we moved to our new flat last week..用next week改写句子 there are fifteen acts in our school talent show last week(用next week改写) last week,a UNICEF woker came to our village.对划线部分提问划线部分是last week We visited our friends last week.（对划线部分提问） 划线部分是：our frienfds