单项选择题
[听力原文] M: Please sit down. What’s the matter with you W: Recently, I have been feeling very tired and can’t sleep well.
A.Teacher and student. B.Manager and customer. C.Doctor and patient. D.Secretary and client.
A.She never eats breakfast. B.All the time. C.At 7:00. D.At 10:00.
A.光一秒钟以后能走完25%的距离,从地球到月球。 B.光在一秒钟内可以完成地球到月球距离的四分之三。 C.光一秒可以走过地球至月球距离的四分之三。 D.光一秒钟可以通过地球到月球距离的四分之三。