单项选择题
M:I hope that the bank will be open. W: he sign says nine am. to five pm. weekdays, in am. to twelve noon Saturdays, closed Sundays.
A. 12 noon to 9 pm. B. 9 am to 5 pm. C. 9 am to 12 noon.
A. changed B. had changed C. has changed D. changes
A. have worked B. had been working C. were working D. had worked