【题目】Jack usually b____ his teeth two times a day.
【答案】brush
【解析】
句意:Jack经常一天刷两次牙。由句子和首字母提示可知是brush,主语是三单,所以三单形式是brushes,故答案为brushes。

【题目】Jack usually b____ his teeth two times a day.
【答案】brush
【解析】
句意:Jack经常一天刷两次牙。由句子和首字母提示可知是brush,主语是三单,所以三单形式是brushes,故答案为brushes。