单项选择题

Air pollution refers to the presence of all the following EXCEPT______.

A．harmful solids
B．harmful gases
C．harmful liquids
D．harmful chemicals
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What does Mark think of cricket
A．It is exciting.
B．It is hard game.
C．It is a slow game.
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单项选择题
Which of the following is NOT included in the exhibition held in New York
A．Traditional paintings.
B．Services and tureens.
C．Bowls and vases.
D．Ivory works.
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