It is generally believed that teaching is it is a science. A. an art much as B. much an a

问题补充：

It is generally believed that teaching is it is a science.

A. an art much as

B. much an art as

C. as an art much as

D. as much an art as

答案：

A. an art much as

B. much an art as

C. as an art much as

(答案→)D. as much an art as

解析：as…as…“像……一样”，much应在冠词之前。