Поставьте глаголы в правильную форму

Mr. Sherlock Holmes was sitting one morning at the breakfast table in his room in Baker Street. His friend Dr Watson (stand) near the window examining a walking stick which a visitor (leave) the day before. «To Dr Mortimer, from his friend,» (write) upon it.

Sherlock Holmes suddenly (turn) to Watson, «The owner of the stick (have) a dog which (be) larger than a terrier and smaller than a mastiff. » Watson was surprised. «How you (know) ?