题目内容
4．My friends in Australia say that they now have hot days，with temperatures in thethirties （thirty）．分析 我澳大利亚的朋友说他们那现在的天气很热，温度有三十多度．
解答 答案：thirties．
本题考查"三十"的英语表达法，一般表示为基数词thirty，在这里in the thirties是一个固定搭配，意思是三十几，所以应该用thirty的复数形式thirties．故填thirties．
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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