The food that you bought yesterday should be eaten ________．It may go bad if you don't．

A.as fast as possible

B.as quickly as you can

C.as soon as possible

D.so soon as you can

答案及解析： C

解析：

eat food是从时间的长短上来说，而不是从速度上说的，而as soon as possible／one can是从时间段上讲的。