PART ONE
Questions 1-8
·For questions 1-8 you will hear eight short recordings.
·For each question, mark one letter (A, B, or C).
·After you have listened once, replay each recording.

A．are determined by financial institutions.
B．vary from day to day.
C．are agreed upon by two trading countries.

A．A．at
B．B．for
C．C．in