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.
<上一题 目录 下一题>
热门 试题

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
单项选择题
The passage centers on the controversy ______.
A．between American and New Zealand biologists over genetic modification
B．as to whether the study of genetic modification should be continued
C．over the possible adverse effect of a GM bacterium on plants
D．about whether Elaine Ingham should be fired by her university
相关试题