is no doubt that the Great Wall is one of the wonders of the world.A. ThereB. ItC. ThisD.

问题补充：

is no doubt that the Great Wall is one of the wonders of the world.

A. There

B. It

C. This

D. That

答案：

(答案→)A. There

B. It

C. This

D. That

解析：考查固定句型：There is no doubt that…，毫无疑问…，句意：毫无疑问长城是世界奇迹之一。选A。