(单选题)

Why is the commemorative envelope released at the Liangmaqiao Diplomatic Office building in Beijing? ( )

A.to marks the 70th anniversary of the founding of the PRC

B.to memorize the 70th anniversary of the establishment of

C.ina-Russia diplomatic relations
C. to commemorate the friendship between two countries

D.all the answers above

参考答案：D

参考解析：

细节题。定位第二段，今年是中华人民共和国成立70周年，也是中俄建交70周年。第五段，embodies the close friendship between the two countries spanning seven decades.A项：为了纪念中华人民共和国成立70周年；B项：纪念中俄建交70周年；C项：为了纪念两国之间的友谊；D项：上面所有的答案。故本题正确答案选D。

知识点：细节题英语阅读理解通用英语