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

[　　]

---Is Medicine a science?
---Well, nowadays, most doctors recognize that medicine is ______ it is a science.　　

1. A.
   an art as much 　　　　
2. B.
   much an art as 　　
3. C.
   as an art as much
4. D.
   as much an art as

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

[　　]

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

[　　]

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

[　　]