-Which is the sun the moon or the earth? ---Of course the sun is.A. smallerB. bigger

问题补充：

---Which is , the sun, the moon or the earth? ---Of course the sun is.

A. smaller

B. bigger

C. the biggest

D. the smallest

答案：

A. smaller

B. bigger

(答案→)C. the biggest

D. the smallest

解析：考察形容词最高级,在三个或者三个以上事物进行对比,用形容词的最高级,根据答语,当然是太阳了,可知选C,最大的.