题目内容
2.Helen brushes herteeth(tooth) twice a day.分析 海伦一天刷两次牙.
解答 答案:teeth 考查单词填空.根据句意海伦一天刷两次牙.tooth要用复数形式teeth.
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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