In the foreign trade business, the trade terms CFR is often used. CFR is the abbreviation for （）.

单项选择题The Customs shall reply in writing within （） from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.

A. one month
B. two months
C. three months
D. six months

单项选择题We usually accept payment by irrevocable L C payable （） shipping document.

A. among
B. between
C. against
D. about