听音，选出你所听到的句子。（每题2分，10分）   
（1）A.I cleaned my room. 
B.I finished my homework.
（2）A.She usually walks to school.
B.She didn’t walk to school.
（3）A.Where did you go?         
B.When did you do?
（4）A.Did you go to the Great Wall? 
B.Did you see my black bike?
（5）A.I bumped my head. 
B.I cut my finger.