Question

 (2011年青島聯(lián)合模擬)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：選A�？疾槎ㄕZ從句。句意：中國新的食品法規(guī)定了食品召回制度，即如果食品達不到標準，生產(chǎn)者就必須停止生產(chǎn)。先行詞為a food recall system，定語從句為producers

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