单项选择题

Paul is amazingly ______ in trying to get Mary to go out with him.

A．consecutive
B．condensed
C．perpetual
D．persistent
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单项选择题
The ______ among his sisters was that he ought to marry the girl as soon as possible to avoid a scandal.
A．consensus
B．compromise
C．reconciliation
D．contradiction
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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