单项选择题
A．rich B．lacking C．found D．hiding
A. when did you get back B. What a surprise I got C. How I admire you D. I am Tom E. got hold of F. got through G. this is Tom H. tried to contact you
A．Six Stages for Repairing Sam’s Bicycle. B．Possible Steps of Problem-solving. C．Necessities of Problem Analysis. D．Importance of Analyzing a Problem.