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Mother:
Have you finished your homework ,my son? 
作业做完了吗，儿子？
Son:
No,Mummy.I'm so drowsy that I can't write any words.
还没呢，妈。我太累了，一个字也写不下去。
Mother:
It is a bad habit to not finish your homework on time.
不按时完成作业是个坏习惯。
Son:
I see ,Mummy.I'm going to wash my face and wake myself up.
知道了，妈。我去洗把脸，让自己清醒一些。