Each country of course in Copenhagen has its own particular priorities and concerns wh

问题补充：

Each country, of course, in Copenhagen has its own particular priorities and concerns, which is why agreement is so difficult to reach.

A. the; an

B. /; an

C. a; the

D. /; the

答案：

A. the; an

(答案→)B. /; an

C. a; the

D. /; the

解析：考查冠词。in + 国家，不加冠词，如：in America ,in China ,所以第一个空不加冠词，第二个空是泛指一个协议，所以加冠词应为an agreement 。故选B 。