Are they perparing ____ (have)lunch?

Are they perparing ____ (have)lunch? They are busy ________ (have) lunch. They are to have for lunch.这句话对吗?为什么? 什么 they have lunch at school?是does 还是 are where have they lunch? What are they doing?Are they have lunch?这2句话哪里有问题吗 they are twins and they have the same ____ They have lunch可以吗? what are they going to have a lunch?的意思 （可以有回答形式 （把句子补充完整；1)They.are.________ ______（寻找）a.place.to.have.lunch Yes,the children are hungry.Can they have lunch now?写适当的问句 they are have a meeting.=they____ ____ a meeting.