短文改错（共10小题; 每小题一分，满分10分）
下面短文中有10处语法错误。请在有错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧）,并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从11处起）不计分。

例如： It was very nice to get your invitation to spend ∧weekend with you. Luckily the I was completely free then, so I’ll to say “yes”. I’ll arrive in Bristol at around 8 p.m. am in Friday evening. on

As new students at an university in Boston, many of us were unfamiliar with the campus but consequently late for class. One professor, however, was particular intolerant of being late, making clear that no excuse would be acceptable. So when a girl student came in his class one morning later, we expected the worst results. Then the professor demand the reason for her coming late. “I was being waiting online to buy your new book," she replied very nervously. Looked at the rest of the class, the professor asked, "Well, why were not the rest of you late?”