· You will hear an interview with Ms Spencer about the change of telephone numbers in the city.
· For each question 23-30, mark one letter (A, B or C) for the correct answer.
· You will hear the interview twice.
The cost of call will

A． one
B． another
C． other

A. update the materials and facilities on the date of change.
B. update the materials and facilities within one year.
C. update your materials and facilities beforehand.