英语：为什么填has been

英语：为什么填has been susan has been to school camp before.为什么填has been to?为什么填has been to?不填has gone to? It （has been） suggested that bright children take their exams early为什么填has been 下面的英语怎么填.为什么这么填?用miss的适当形式添.Jim has been ill for three weeks and ------(miss)a lot of lessons. Has Jim arrived yet Yes ,he has ___there for several days .填been还是gone为什么 Jim___for thirty years.为什么填has been married?直接说has married不行吗?再说也应该是been +V行式啊. the work has been __ finished.为什么要填nearly?而不填almost?谢谢. All __ done now.为什么要填has 而不填have been和have? 英语这题这个词的词性John has never been ____a plane.答案填aboard 请问这里它是副词还是介词?为什么呢? 这句英语填空怎么理解?There__________marked progress in building the social security system in the past few years.为什么要填has been 英语中have been；has been是什么? 英语,has been和 had been has been to和has gone to的区别Kate has never （ ） to school in her early age.应该填been还是gone?为什么? there has been...为什么要加been? means单复数问题Every means( )tried but without much result.答案填“has been”为什么不用have been 60000people______during the accident为什么填were died,不能用had been died或has been died when and where to go for my holiday__not been decided yet.填have?has?为什么? Mary ------her lessons from seven to ten last night 为什么填has been doing?