单选题

问答题 A. They are numbers in the accounting books of IMF.
B. They are privileges.
C. They are conditions.
D. They are visible currencies.

问答题 A. German mark
B. Pound sterling
C. U. S. dollar
D. French franc

问答题 A. 1970 B. 1979 C. 1980 D. 1981