Question

 (2011年青岛联合模拟)China’s new food law provides for a food recall system________producers have to stop production if their food isn’t up to standards.

A．where                          B．that

C．when                           D．which

Answer 1

解析：选A。考查定语从句。句意：中国新的食品法规定了食品召回制度，即如果食品达不到标准，生产者就必须停止生产。先行词为a food recall system，定语从句为producers

 have to stop production if their food isn’t up to standards (in the food recall system)，故选A。