此题要求改正所给短文的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上划一个勾(√)；如有错误(每行只有一个错误)，则按下列情况改正：
该行多一个词：把多余的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉。
该行缺一个词：在缺词处加一个漏字符号(^)，在该行右边横线上写出该加的词。
该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Last weekend, my mother and I went
to shoe shop to
71.
buy a pair of new
shoes for me. When we got there, I noticed
72.
a foreign lady is
talking to a salesgirl. But the salesgirl did 73.
not understand that
the foreigner was saying. They looked 74.
very worrying. So I
decided to help them. I went up to the 75.
foreign lady and
talked to her by English. I learned that the 76.
lady came from
Australia and wanted buy a pair of running 77.
shoes. I told this
to the salesgirl. The lady was very much glad 78.
when she took her
shoes. All of them expressed their thanks 79.
to me. And I felt
happily that I could help others.
80.