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配方法解方程应把它先变形为（ ）A. . B. C. D. 答案：【答案】D【解析】对方程利用配方法进行变形即可得到答案．将原式作如下变形：，，，．故C选项是正确的．Lilly was a French Canadian girl who grew up in the farming community. When she was 16, her father her to drop out of school to contribute to the family income. With English as her second language and education, the future didn't look bright for Lilly.Lilly's father was a stubborn man who took “no” for an answer. He told Lilly to find a job. With small hope of gaining , each day, she would just ride to the city, walk around and at dusk return home.On one of her trips, Lilly saw a sign at a big company. she knocked on her very first door. In her English, Lilly told the office manager she was interested in the position of being a secretary. The manager to give the girl a chance. He directed her to type a single letter, and then . Lilly looked at the clock and saw it was 11：40 a．m. She thought everyone would be leaving for lunch at noon, when she could away in the crowd. But she knew she should the letter.On her first try, Lilly got through one line of five words and made four mistakes. On her second attempt, she completed a full paragraph, but still made many mistakes. She looked at the clock: 11：55—five minutes to . Just then, the manager walked in. He came directly over to Lilly, read the letter and said, “Lilly, you're doing work !”With those simple words of encouragement, her desire to escape disappeared and her began to grow. Lilly thought，“Well, if he thinks it's good, then it must be good. I think I'll stay！” Lilly did stay—all because someone gave a and uncertain girl the gift of self---confidence when she knocked on the door.1.A. remindedB. forced C. encouraged D. helped2.A. poor B. formal C. good D. modern3.A. often B. usually C. sometimes D. hardly4.A. employment B. improvement C. judgment D. development5.A. carefully B. happily C. aimlessly D. rapidly6.A. Confidently B. Proudly C. Calmly D. Nervously7.A. broken B. perfect C. written D. fluent8.A. refused B. decided C. pretended D. failed9.A. stopped B. continued C. left D. sighed10.A. break B. slip C. pass D. drive11.A. read B. write C. attempt D. deliver12.A. freedom B. success C. discussion D. reward13.A. terrible B. excellent C. honest D. easy14.A. belief B. patience C. confidence D. strength15.A. shy B. lonely C. selfless D. modest