单项选择题


Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．Only humans respond to emotions by shedding tears.
B．Only humans shed tears to get rid of imitating stuff in their eyes.
C．Only human tears can resist invading bacteria.
D．Only human tears can discharge certain chemicals.
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association
单项选择题
More and more young Europeans remain single because
A．they are driven by an overwhelming sense of individualism
B．they have entered the workforce at a much earlier age
C．they have embraced a business culture of stability
D．they are pessimistic about their economic future
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