no doubt that a green campus plays an important role in the growth of students both physi

问题补充：

no doubt that a green campus plays an important role in the growth of students, both physically and mentally.

A. It is

B. There has

C. There is

D. It has

答案：

A. It is

B. There has

(答案→)C. There is

D. It has

解析：考查短语搭配。There is no doubt that…毫无疑问……，固定短语，选C。