Jack I’m afraid I’ll turn to youI think chemistry is physics．A. as a difficult subject

问题补充：

Jack, I’m afraid I’ll turn to you．I think chemistry is physics．

A. as a difficult subject as

B. a subject the same difficult as

C. as difficult a subject as

D. the same difficult subject as

答案：

A. as a difficult subject as

B. a subject the same difficult as

(答案→)C. as difficult a subject as

D. the same difficult subject as

解析：考查as + adj. + (a/an) + n. + as结构，句意：我认为化学和物理是一样难的学科。故选C。