This printer is of good quality.If it break down within the first year we would repair i

问题补充：

This printer is of good quality.If it break down within the first year，we would repair it at our expense.

A. would

B. should

C. could

D. might

答案：

A. would

(答案→)B. should

C. could

D. might

解析：第一句话用了一般现在时，第二句话的主句却出现了would，这暗示条件句中使用了虚拟语气。由语境可知这里是对将来的虚拟，条件状语从句中可以用“动词过去式/should＋动词原形/were to＋动词原形”这三种形式中的某一种。“should”此时，常译为“万一”。