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.

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．helping           B．to have helped     C．to help           D．having helped

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.

1. A.
   helping
2. B.
   to have helped
3. C.
   to help
4. D.
   having helped

 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

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