题目内容
19．Be careful with the dogs．They are thosepolicemen's （policemen）．分析 小心这些狗．它们是那些警察的．
解答 答案：policemen's考查单词填空．根据句意．它们是那些警察的．要用名词所有格，不是以s结尾的，加's，故答案是 policemen's．
点评 本题考查用所给单词的适当形式填空，首先要根据语境明确句意，然后再根据相关语法对所给单词在形式上做出正确的变化．
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