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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
vt. 抑制，阻止，束缚，剥夺
