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