The tour will provide ____ unique opportunity for you to live with an American family for a fortnight in ____ hope that you will have a better understanding of the US.

A. a; /　　　　　　 B. an; /　　　　 C. a; the　　　　　 D. an; the

The tour will provide ________ unique opportunity for you to live with an American family for a fortnight in ________ hope that you will have better understanding of the US.

A. a; /                              B. an; /                        C. a; the                      D. an; the