单项选择题
A. By making laws. B. By enforcing discipline. C. By educating the public. D. By holding ceremonies.
A. their purchase in a supermarket B. their part-time jobs C. the yard work D. drawbacks of having a part-time job
A. when they spend less time in a drugstore B. when they have very little time in a department store C. when they have a lot of time in a drugstore D. when they spend very little time in any stores