改错.下列句子各有一处错误,找出并改正
问题描述：
改错.下列句子各有一处错误,找出并改正
Your mother hasn't taught you to use it ,have you?
That wasn't a knock at the back door ,was that?
There is plenty of fuel in the machine ,isn't it?
Bob told an interesting story to his classmates,did he?
答
1、Your mother hasn't taught you to use it ,have you（改为has she）?2、That wasn't a knock at the back door ,was that(改为it)?3、There is plenty of fuel in the machine ,isn't it(改为there)?4、Bob told...