短文改错（共10小题；每小题1分，满分10分）
此题要求改正所给短文中的错误,对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个(√);如果有错误(每行只有一个错误)，则按下列情况改正：
此句多一个词：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。
此句缺一个词：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。
此句错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
Several years before, Mrs. Green was a famous musician who taught
小题1:
the music at a college, and many of her students succeeded in their 小题2:
business. Live with her husband at home now, Mrs. Green, in common
小题3:
as some old people, finds her memory is failing. Sometimes she forgets 小题4:
what she has done or will do, that often gets her in trouble. Mr. Green 小题5:
noticed it and persuaded her into see a famous doctor who lives 小题6:
in the capital. He bought two tickets to London and then 小题7:
asked her to put it into her handbag while she was playing 小题8:
piano. When they reached the airport the next morning, the old 小题9:
woman said,“ If only I have brought my piano. I’ve left the tickets on it.” 小题10:
式中：CD——孔底偏差（cm）；AB——孔口偏差（cm）；OA——钻机桅杆高（m）；AC——孔深（m）。