I think Chinese is as as Maths.A. usefulB. more usefulC. most usefulD. the most useful

问题补充：

I think Chinese is as as Maths.

A. useful

B. more useful

C. most useful

D. the most useful

答案：

(答案→)A. useful

B. more useful

C. most useful

D. the most useful

解析：考查固定结构。As…as间要用形容词或副词的原形。选A。