单项选择题

According to the first paragraph, plastics can be classified into _____________.

A．monomers and polymers
B．flexible plastics and inflexible plastics
C．thermoplastics and thermosetting plastics
D．natural plastics and synthetic plastics
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单项选择题
The word sympathetic in the last sentence of the second paragraph is closest to _____________.
A．favorable
B．pitiable
C．easy
D．harmless
单项选择题
What is the author's attitude toward all the laws against drunken driving
A．Optimistic.
B．Pessimistic.
C．Indifferent.
D．Not clear.
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