用when, what, who, where, how, why填空。

1. —_____ is going to go to Xinjiang?                    

    —Lingling.                                          

2. —            are you going to go home?                

    —I'm going to ride my bike.                        

3. —        _  don't you buy a book?                    

    —Because it's too expensive.                      

4. —         _ did Lily watch a programme about English?

    —Last night.                                        

5. —            is she going?                          

    —To the library.                                    

6. —             did you do yesterday?                  

    —I cleaned my house.                                

卡尔主张心理学研究对象是（）。