问题标题:
atschool,wemustcleantheclassroom改为同义句atschool,we()()cleantheclassroom
问题描述:

atschool,wemustcleantheclassroom改为同义句atschool,we()()cleantheclassroom

高滢回答:
  填haveto(必须)   Atschool,we【haveto】cleantheclassroom.   句子翻译是:在学校,我们必须打扫教室   此处must=haveto
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