听一段材料，回答下面几个小题。
Why won't Mr. Stone come to the clinic tomorrow?
A. He can't spare the time.
B. The clinic will be closed.
D. Dr.!Miltonwon't come to work.
When is the clinic open in a week?
A. From Monday to Friday.
B. On weekdays except Thursday.
C. During the whole week.
What time has finally been fixed for Mr. Stone to come?
A.5:30p. m., Wednesday.
B.6:15p. m., Wednesday.
C. 6:15 p. m., Thursday.