单项选择题

During the past ten years there have been dramatic changes in the international situation.

A．permanent
B．powerful
C．striking
D．practical
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单项选择题
He is said to be suffering from terminal cancer and has asked for euthanasia (安乐死).
A．acute
B．chronic
C．final
D．fatal
单项选择题
We should never content ourselves with a little knowledge only.
A．convince
B．satisfy
C．comfort
D．benefit
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