that they found an unusual plant in the forest.A. It is said B. They are said C. It said

问题补充：

that they found an unusual plant in the forest.

A. It is said

B. They are said

C. It said

D. It says

答案：

(答案→)A. It is said

B. They are said

C. It said

D. It says

解析：此题考查it作形式主语的用法。