The old tower must be saved the cost.A. howeverB. whateverC. whicheverD. wherever

问题补充：

The old tower must be saved, the cost.

A. however

B. whatever

C. whichever

D. wherever

答案：

A. however

(答案→)B. whatever

C. whichever

D. wherever

解析：句意：不管代价多大都必须拯救那座古城。whatever无论什么，做cost的宾语。