单项选择题

Oil is an important ______ material which can be processed into many different products, including plastics.

A．raw
B．bleak
C．flexible
D．fertile
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单项选择题
Picasso was an artist who fundamentally changed the ______ of art for later generations.
A．philosophy
B．concept
C．viewpoint
D．theme
单项选择题
You shouldn't be so ______ —I didn't mean anything bad in what I said.
A．sentimental
B．sensible
C．sensitive
D．sophisticated
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