At Columbia University Dt.Liasy Faris and colleagues are studying tears for clues to the diagnosis of diseases away from the eyes. Tears can be obtained painlessly without invading the body and only tiny amounts are needed to perform highly refined analyses.
31. It is known from the first paragraph that ________.
A) shedding tears gives unpleasant feelings to American
B) crying may often imitate people or even result in tragedy
C) crying usually wins sympathy from other people
D) one who sheds tears in public will be blamed
32. What does both those responses to tears refer to?
A) Crying out of sorrow and shedding tears for happiness.
B) The embarrassment and unpleasant sensation of the observers.
C) The tear shedders apology and the observers effort to stop the crying.
D) Linking illness with crying and finding the chemical composition of tears.
33. Counterproductive very probably means ________.
A) having no effect at all
B) leading to tension
C) producing disastrous impact
D) harmful to health
34. What does the author say about crying?
A) It is a pointless physiological response to the environment.
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