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
网友回答
A. helping
B. to have helped
(答案→)C. to help
D. 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。