At the entrance     a big office in London there was a book       all employees had to sign       they arrived each morning. At nine o’clock, the manager’s secretary, who lived in a small flat above the office, had to        a red line under the last name in the book, and anyone who came after that had to explain_      he was late.     there was a thick fog in the city, the first person            (arrive) late usually wrote “Delayed by fog” under the red line in the book, and then everybody        who came after that just put “ditto” underneath. But one foggy morning, the first man who arrived late wrote “My wife had a baby early this morning” ___      of “delayed by fog” under the red line in the book. Twenty or thirty people who came____   (介词) him put “ditto” underneath this as usual.