29. Please _____yourself from smoking and spitting in public places, since the law forbids them.    A. restrain   B. hinder   C. restrict   D. prohibit  restrain  限制，抑制（某人的行为） hinder  阻碍，阻碍 restrict=put a limit  限制 (时速，物价等) prohibit  禁止 hamper  妨碍，约束