单项选择题

Doctors are often caught in a （）because they have to decide whether they should tell their patients the truth or not.

A．puzzle
B．perplexity
C．dilemma
D．bewilderment

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单项选择题
While a full understanding of what causes the disease may be several years away, （）leading to a successful treatment could come much sooner.

A．a distinction
B．a breakthrough
C．an identification
D．an interpretation
单项选择题
We are doing this work in the（）of reforms in the economic, social and cultural spheres.

A．context
B．contest
C．pretext
D．texture
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