单项选择题

Many proverbs ______ in ancient Greece and Rome and in medieval Europe, spreading from country to country in Latin texts.

A．designated
B．descended
C．originated
D．created
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单项选择题
Now that we have succeeded in isolating this drug, our next problem is to plan its in the laboratory.
A．diagnosis
B．synthesis
C．thesis
D．hypothesis
单项选择题
The President has again ______ with Congress over his budget plans.
A．bumped
B．collided
C．crashed
D．struck
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