This room is much than that one.A. bigB. biggerC. biggestD. the biggest

问题补充：

This room is much than that one.

A. big

B. bigger

C. biggest

D. the biggest

答案：

A. big

(答案→)B. bigger

C. biggest

D. the biggest

解析：本题中有个than为比较级的结构，than前的形容词要使用比较级，big的比较级是bigger，故本题选B。