The students are very h________. They clean houses for the old people every weekend.
2022-05-02 16:53:04 63次 2020年四川省南充市学业水平考试模拟英语试卷 根据首字母填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The students are very h________. They clean houses for the old people every weekend.
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