单选题
This is a subject that has now moved into the political {{U}}domain{{/U}}.
A. extent
B. zone
C. area
D. competition
【正确答案】
C
【答案解析】[解析] domain:领域。C和它意思相近,也表示领域、范围的意思。extent:限度、长度,例如:From the moon you can see the full extent of the Sahara desert.从月球上能看到撒哈拉沙漠的全貌。zone:区域。competition:比赛、竞争,例如:a crossword competition.填字游戏。