--Do you know the name of the cat ______ is lying on the ground?
--Of course, it’s my pet. Its name is Mimi.

Do you know Nelson Mandela, _______ was the first black president of South Africa.

I’ll never forget the days ______ we spent together in the country.

–Do you know the man              is running along the street?
–Yes.He is our math teacher.

---Do you like your maths teacher?
---Sure, because he is the teacher ___ helps me a lot.

That is the cook ______ came from London.

-I’m afraid I can’t pass the English exam.
--Don’t worry. You study very hard. God(上帝) helps those people      help themselves.

My grandparents like to live in a house     is not very big but bright and comfortabe.
A. which     B. who       C. what

The clock ______ last week has gone wrong.