is known to all Great Britain and Northern Ireland the United KingdomA. It; are consiste

问题补充：

is known to all, Great Britain and Northern Ireland the United Kingdom

A. It; are consisted of

B. As; are made up of

C. It; consist of

D. As; make up

答案：

A. It; are consisted of

B. As; are made up of

C. It; consist of

(答案→)D. As; make up

解析：考查句型和词组。根据句子结构可知，该句为非限制性定语从句，所以排除AC。Consist of 由……组成 = be made up of , make up意为组成

句意为，众所周知，大不列颠和北爱尔兰组成了英国。