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

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

A. helpingB. to have helped(答案→)C. to helpD. having helped解析：考查不定式用法。本题考查了不定式做目的状语。句意;为了减少就业的压力，全国的学校要雇佣5千名大学生作为短期的老师，这个数字三倍于去年。故C正确。

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