are busy preparing可以换成（）

people are busy preparing for 英语句子改错（每句一处）1.they are busy preparing an evening party. The students are busy preparing for the national entrance ex while other students are busy preparing for the eaxm ,he___r people are busy preparing for it的同义句 26.We are busy preparing for the exams l__________. The teachers are busy preparing the exams these days . Farmers are busy preparing for Christmas中的preparing是动名词还是现在分 busy preparing的意思 Are you busy now?Yes,i am busy preparing for the coming exam 选择We are _ for the test.A busy prepare B busy preparing C bu They are busy preparing for the exam.So are we .他们在忙着准备考试.我们