homework       
noun [ U ] uk/ˈhəʊm.wɜːk/ us/ˈhoʊm.wɝːk/
A1 家庭作业
work that teachers give their students to do at home
  You can't watch TV until you've done your homework. 做完家庭作业之后你才能看电视。 
 history/geography homework 历史/地理家庭作业 
 - More examples
 - The kids are busy with their homework.
 - My science teacher always sets a lot of homework.
 - "Have you got any homework tonight?" "No."
 - I got A minus for my English homework.
 - For homework I want you to write an essay on endangered species.
 
Idiom   
do your homeworkidiom  认真研究;仔细准备
to study a subject or situation carefully so that you know a lot about it and can deal with it successfully
  It was obvious that she had done her homework and thoroughly prepared for her interview. 很显然她为面试做足了功课,准备很充分。