Ⅱ.听对话， 根据对话后的问题， 选择最佳答案(5分)
W：What's wrong with you, Fred?
M：Well, I was exhausted because I had stayed up all night studying.
6．Why was Fred exhausted?
A．Because he kept studying all night.
B．Because he kept singing all night.
C．Because he kept watching TV all night.
W：Jimmy, you didn't ride your bike to school this morning?
M：No, my bike was broken.So my parents gave me a ride to school.
