Schools across China are expected to hire 50 000 college graduates this year as short-ter

问题补充：

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

答案：

A. help

B. to have helped

C. to help

(答案→)D. having helped

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