单项选择题


Questions 23-30
Word Tips
You will hear a talk between a young employee and a senior cashier of a firm.
You have to complete the sentences 23-30 by choosing the correct answer.
Mark one letter A, B or C.
The time the one-day course began was ______ .

A. 10 o’clock
B. 5 o’clock
C. 9 o’clock