单项选择题

A．To keep the code for its Windows operating system a secret.
B．To design some new computer software.
C．To persuade more PC users to adopt the Windows operating system.
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单项选择题
A．NoB．Yes.C． Not mentioned.
A．No
B．Yes.
C． Not mentioned.
单项选择题
A．The euro has risen in value. B．The US dollar has risen in value. C．German economy has slided into recession.
A．The euro has risen in value.
B．The US dollar has risen in value.
C．German economy has slided into recession.
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