— Food problem is becoming a big one in China! —I think the food before going to shops or

— Food problem is becoming a big one in China!
—I think the food before going to shops or supermarkets.
A. is checked
B. is checking
C. should be checked
D. should check

A. is checkedB. is checking(答案→)C. should be checkedD. should check解析：句意：——在中食品问题正在成为一个大问题！——我认为视频在进入商店或超市之前应该进行检查。结合句意，此处是表示建议，因此用情态动词should,主语the food 与动词 check之间是被动关系，故选C。

这个解释是对的