— When can I come for the photos ? I need them tomorrow afternoon . — They be ready by 12

问题补充：

— When can I come for the photos ? I need them tomorrow afternoon .

— They be ready by 12:00 .

A. can

B. should

C. might

D. need

答案：

A. can

(答案→)B. should

C. might

D. need

解析：这是顾客对摄影师的对话，should 在这里不但表义务，而且有商家的承诺之意。