1．The engineer with whom my father is talking has just come from abroad.
2．The reason why he was late for school was that he met a traffic jam.
3．The doctor who/that is treating for your heart trouble is a relative of mine.
4．This place where you are standing was the site of an old church.
5．The speaker will tell us about some writers and their works that are known to us.
6．This is the best hotel in the city that I know.
7．(2019·吉林省实验中学月考)Is there anyone in your class whose home is far away from the school?
8．I will never forget the day on which I was admitted to a famous university.
9．Do you know the farm which/that I visited with my father last term?
10．Tokyo is a beautiful city to which I will pay a sixday visit during the 2020 Olympic Games.
