The tourism of Linyi a rapid growth over the last decade. Now it's 2nd most visited city i

问题补充：

The tourism of Linyi a rapid growth over the last decade. Now its 2nd most visited city in Shandong Province.

A. saw

B. had seen

C. is seeing

D. has seen

答案：

A. saw

B. had seen

C. is seeing

(答案→)D. has seen

解析：句意：在过去的十年中，临沂的旅游业已经见证了快速发展，现在它是山东省参观人数第二多的城市。和over the last decade连用，用现在完成时，所以选D。