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
网友回答
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。