The policeman told the children _________ play in the street.
A:can't
B:to not
C:don't
D:not to
①北京人 ②元谋人 ③山顶洞人 ④河姆渡居民 ⑤半坡居民
____
长期不吃新鲜蔬菜、水果的人易患 ( )