题目

词语运用       阅读短文，从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。每空限填一词，每词限用一次。方框中有两个词是多余的。 polite,   exercise,   rush,   fail,   reason,   wait, happy,   difference,   direct,   hate,   correct,   quick My family moved to America last year from a small town in north China. I had a part-time job as a  1   was serving food to a middle-aged cou in a Chinese restaurant. One day, when Iple, the wife asked me how I could bring their food so  2   . I 13．函数y=sin（$\frac{π}{3}$-x）+sin（$\frac{π}{3}$+x）的最小正周期是2π．