英语改错 请找出下列句子中的错误,并改正.1.I have bought the piano for six years.2.where have you gone ---- I’ve gone to shool .3.How many pages have you read by the end of last year 4.while I walked in the steet ,I saw my teacher .5.They have had their lunch at tweleve 6.The workers have repaired the machines just now .7.You have waited here since two hours

英语改错 请找出下列句子中的错误,并改正.
1.I have bought the piano for six years.
2.where have you gone ---- I’ve gone to shool .
3.How many pages have you read by the end of last year
4.while I walked in the steet ,I saw my teacher .
5.They have had their lunch at tweleve
6.The workers have repaired the machines just now .
7.You have waited here since two hours