is no doubt that the world is being smaller due to the technological advances made by t

问题补充：

is no doubt that the world is being smaller, due to the technological advances made by the computer.

A. It

B. There

C. That

D. This

答案：

A. It

(答案→)B. There

C. That

D. This

解析：考查固定句型。句意：因为有了电脑带来的科技进步，世界正在变小是毫无疑问的。There is no doubt that...“......是毫无疑问的”，是一个固定句型，是there be句型的变型。故选B。