（2010·江苏宝应中学高三上第一次学情调查） 33. China’s new food law provides for a food recall（召回）system ______ producers have to stop production if their food isn’t up to standards.
A. where B. that C. when D. which
（2010·江苏宝应中学高三上第一次学情调查） 33. China’s new food law provides for a food recall（召回）system ______ producers have to stop production if their food isn’t up to standards.
A. where B. that C. when D. which
B