—Why is Tom so sad?

   —He has lost his new bike _______cost him 1800 yuan.

A. who               B. which                 C. whose

—What are you looking for?

—I’m looking for the watch ____ I bought yesterday.

       A. which                      B. who                         C. whose

The Gay Genius is the book      I like to read every day.

    A. that                      B. who                    C. what

I can't find the book __________my mother bought me.

A. who         B. when        C. which

 The house________ Lu Xun used to live is now a museum.

A. which       B. that     C. in which       D. there 

The man_________       is talking to our teacher is Betty’s father.

A. which          B. whom        C. who          D. what

 It’s bad for health to hurry to move into a house ________ has new furniture in it.

     A. who                    B. where                    C. that

Teenagers like reading the books _____ are written by Guo Jingjing.

    A. who      B. what    C. whose    D. that

 The Palace Museum is the best place _________ I’ve ever visited.

       A. that            B. which        C. where `      D. what

 I love the school           I have studied in for three years

   A. where      B. when       C. that