单项选择题

In 1847 most countries of the world were ______.

A．not yet using postage stamps
B．collecting valuable stamps
C．buying stamps from Mauritius
D．printing their own stamps
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单项选择题
Dr. Sheeler was a little ______ when Mr. Nelson insisted that he come.
A．fussy
B．angry
C．anxious
D．crazy
单项选择题
We can conclude that Mr. Nelson's former wife ______.
A．was often ill
B．seldom got ill
C．had married another man
D．had undergone an operation two years before
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