A. We regret that the goods you inquire about are not available.B. We can offer you a quotation based upon the international market.C. Moreover, we’ ve kept the price close to the costs of production.D. I should have thought my offer was reasonable. 我们可以按国际市场价格给您报价。

A．the importance of applying for a passport and visa
B．safety regulations for visiting other countries
C．the limitations to traveling around the world
D．the requirements for their traveling abroad

A．
B．
C．
D．