Cleaners do ( ).They keep our city clean and tidy A an important workB a important job C important work D important job

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• Cleaners do ( ).They keep our city clean and tidy A an important workB a important job C important work D important job
• Cleaners do ( ).They keep our city clean and tidy A an important work
• 在短文中的括号内填入适当的词,使短文通顺,每个县填一词,首字母以给.some students s_ many of us are the only child in our f_.we have not able to do hard work.to clean the toilet is g_ to teach us h_ to do difficult jobs.by cleaning the toilets.we learn to understand the c_ workers.on the o_ hand ,some students t_ toilets are very dirty.it is ease for us to get s_.they do not think it is the students' job.we have more important things to do.cleaning the classroom is cuough.
• We must do everything possible to keep them ____(safety)
• Something must been done to stop polluting.这句话对吗?