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。