单项选择题

What is the best title for this passage

A．How to Recognize and Define Problems.
B．Six Stages for Repairing Bicycles.
C．Stages of problem Analysis.
D．Analyzing a Problem by Yourself
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单项选择题
What is the main idea of the first paragraph
A．People do not always analyze the problem they meet.
B．People often accept the opinions or ideas of other people.
C．People may learn from their past experience.
D．People can not solve some problems they meet.
单项选择题
What does the author imply about the use of wallpaper before 1730
A．Wallpaper samples appeared in the architectural manuals.
B．Wallpaper was the same color as the wall paints used.
C．Wallpaper was not used in stone houses.
D．Patterned wallpaper was not widely used.
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