[单选题]China's new food law provides for a food recall system _____ producers have to stop production if their food isn't up to standards.(1分)
Awhere
Bthat
Cwhen
Dwhich
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参考答案
试题答案：
A
答案解释：
解题思路： :考查定语从句。语意: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。
