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
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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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A resolution to maintain the ceasefire was carried by an ______ majority.
A．overwhelming
B．overthrowing
C．overflowing
D．overturning
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