21. cook, cooker
cook厨师;
cooker厨具 eg:He is a good cook.
22. damage, damages
damage不可数名词, 损害，损失;
damages复数形式, 赔偿金 eg 900 damages
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 eg:The police are questioning everyone in the house.
24. problem, question
problem常和困难连系，前面的动词常为think about, solve, raise;
question常和疑问连系，多和ask, answer连用 |
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