Because of the financial crisis, days are gone _   _ local 5-star hotels charged 6,000 yuan for one night.

A. if                  B. when             C. which             D. since

Because of the financial crisis, days are gone _   _ local 5-star hotels charged 6,000 yuan for one night.

A. if                  B. when             C. which             D. since

Because of the financial crisis, days are gone _   _ local 5-star hotels charged 6,000 yuan for one night.

A. if                  B. when             C. which             D. since

 Because of the financial crisis, days are gone _   _ local 5-star hotels charged 6,000 yuan for one night.

A. if                  B. when             C. which             D. since

Because of the financial crisis, days are gone _   _ local 5-star hotels charged 6,000 yuan for one night.

A. if                  　　　 B. when             　　　C. which             　　　D. since