no doubt the Amber Room is one of the wonders of the world.A. It is; thatB. It is; wheth

问题补充：

no doubt the Amber Room is one of the wonders of the world.

A. It is; that

B. It is; whether

C. There is; that

D. There is; whether

答案：

A. It is; that

B. It is; whether

(答案→)C. There is; that

D. There is; whether

解析：句意：毫无疑问，琥珀宫是世界奇观之一。There is no doubt about sth./that 从句意为“毫无疑问……”。是固定句式故选C。