单项选择题

A．Six Stages for Repairing Sam’’s Bicycle.
B．Possible Ways to Problem-solving.
C．Necessities of Problem Analysis.
D．Suggestions for Analyzing a Problem.
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coordination
单项选择题
A．If people had more time to learn how to do it.B．If its cost went down.C．If it could make buildings more attractive.D．If people realized its many advantages.
A．If people had more time to learn how to do it.
B．If its cost went down.
C．If it could make buildings more attractive.
D．If people realized its many advantages.
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