we went to Italy for a holiday last year. That must have been nice. 问题：为什么用must have been为什么不用must be?

we went to Italy for a holiday last year. That must have been nice. 问题：为什么用must have been为什么不用must be? we're going to the south of italy for vacation (the south of italy )划线过了8点35不要了 My father went to Italy on （busy） last night Last year my wife and I went to Verona,Italy for holidays.We arrived early in the morning.Istopped our car outside the old city and decided to have a 36 in it.I didn’t want to get lost and I 37 speak Italian.So I wrote down the name of the street t 十万火急：we all agreed to his suggestion that we went to pairs for sihgtseeing为什么went要改为 go? I went to Italy中/went/的/t/是否可以不读 a,went,ask for,we,to,policeman,to,help,连词成句a,went,ask for,we,to,policeman,to,help,连词成句 Yesterday we went to the farm___ my father used to work for nearly ten years. _____ the expense,I _____ to Italy.A.If it were not,go B.Were it not for,would go C.We WE WENT TO RETURN SOON we went to the cinema. we went to the amusement we went to a b_______beach. i went to (the )Italy为什么不能用定冠词the 意大利不是唯一的吗 My wife and I went to Italy last year,____ we spent a very useful three weeks.这里用which还是用where?为什么?的确用where,为什么不可以用which呢？ After a school terms hard work ,we went to the beach for a r_____holiday After a school-term's hard work.we went to the beach for r_____ holiday last sunday we went to the park and _____(stay) there for over two hours.