【单选题】
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
A、within two hours
B、within three hours
C、within four hours
D、within five hours
查看正确答案
A、Fine. How are you? B、How do you do? Glad to meet you, too. C、How are you? Thank you! D、Nice. How are you?
