翻译英语定语从句

1.The man you met in my office last week is a math teacher.
2.The water that isn't pure usually can cause serious illnesses.
3.I will visit the house that my friend used to live in.
4.My mother said,"I will remember forever the day when you were born ."
5.The scientist whose daughter studies in our class will give us a speech here.
6.This is the teacher from whom I borrowed some books.

the man you met in my office last week was the mathematics teacher.
Water that is not clean usually causes serious illness.
I will visit the house which my friend used to live in.
My mother said,"I will remember the day you were born for ever".
The scientist whose girl is studying in our class will give us a talk in our classroom tomorrow.
This is the teacher which I borrowed books from.

1.the gentleman you saw in my office last week is a math teacher
2.the water which is impurity could cause diease
3.i'