The company is quite honest and guarantees the new product be under warranty for three ye

问题补充：

The company is quite honest and guarantees the new product be under warranty for three years.

A. should

B. shall

C. will

D. can

答案：

A. should

(答案→)B. shall

C. will

D. can

解析：句意，这家公司很诚实并且保证新的产品保修期三年。这里表示给对方承诺，故用shall。