Last Saturday I was busy ( ) my homework .为什么答案是with 而不是doing

Last Saturday I was busy _____ my homework and my mother was busy _____ the housewok. my busy saturday 英语作文以 这个为内容 last Saturday I was so busy at 8:00 I went to__Mrs green last Saturday.She was in hospital.A.watch B.visit I Mrs.Green last Saturday.She was in hospital.用met还是visited Last Saturday I was busy ( ) my homework .为什么答案是with 而不是doing Last Saturday was Tree Planting day. 请教there was an football match last saturday为什么last saturday 前面不用加at A:where you at home last saturday B:No ,( ) ( ).A :( ) ( )you B:I was at school .每空一词填空. 英语短文续写『急』Last Saturday,I was along the downtown area.I was keeping an eye on things.Suddenly... last time i was Where什么you last Saturday?I什么at home A.are,Where什么you last Saturday?I什么at home A.are,am B.were,were C.were,was it was halloween last saturday 是万圣节吗? How was your last Saturday?(改为同义句) The weather was terrible last Saturday.同意句） Day was Tree last Planting saturday连词组句 My mom was busy last Saturday?怎么提问 改成疑问句!例子∶I was nervous before my last exam.Were you nervous before your last exam?⒈The weather was nice last Saturday.⒉My first lesson today was maths. I went to the zoo last Saturday.对划线部分提问 last Saturday被划线