23. 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

26. Schools across China are expected to hire 50,000 college graduates this year as short-term teachers, almost three times the number hired last year, reduce unemployment pressures. (A) help (B) to have helped (C) to help (D) having helped