21. The population of Jiangsu __ to more than twice what it was in 1949. The figure is now approaching 74 million. (A) has grown (B) have grown (C) grew (D) are growing

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