My father prefers taking a subway to driving his own car. Because the petrol is very expen

问题补充：

My father prefers taking a subway to driving his own car. Because the petrol is very expensive.

A. dear

B. good

C. bad

D. cheap

答案：

A. dear

B. good

C. bad

(答案→)D. cheap

解析：句意：我爸爸宁愿乘地铁也不愿开自己的车，因为汽油太贵。prefer… to…比起……更喜欢……，后跟名词或动名词，expensive=dear昂贵的，故选D。