单项选择题
Conversation 2
A.8 hours. B.9 ~ 10 hours. C.10 ~ 11 hours. D.12 hours.
A.The man turned on the light. B.The man has lost his glasses. C.The woman know where the switch is. D.The man missed the classes.
A.Cheryl. B.Christine. C.Kelly. D.Charlotte.