23. police, policeman
police 警察的总称,后接复数谓语动词;policeman 指某个具体的警察。
例:The police are questioning everyone in the house.
24. problem, question
problem 常和困难联系,前面的动词常为 think about, solve, raise;question 常和疑问联系,多和ask, answer 连用。
25. man, a man
man 人类;a man 一个男人。
例:Man will conquer nature.
26. chick, chicken
均可指小鸡,chicken 还可以當鸡肉讲。
例:The chicken is delicious.
27. telegram, telegraph
当电报解时,telegram 指具体的,telegraph 指抽象的。
例:a telegram, by telegraph