How many countries the European Union made up of do you know?A. isB. areC. haveD. has

问题补充：

How many countries the European Union made up of, do you know?

A. is

B. are

C. have

D. has

答案：

(答案→)A. is

B. are

C. have

D. has

解析：答案：A考查主谓一致。分析句子结构可知，专有名词the European Union是句子的主语，谓语动词应用单数形式。由此结合固定短语be made up of可排除C、D两项，空格处应用is。故答案选A。