一个英语问题,May Day前的介词可不可以用"in".原题是:How many days will you take

How many days are there in may? how many days do you think they will need in shanghai? 1.How many days in may?( )2.How many months in 2 year?( ) 3. How many days do you have off for National Day? How may days are you going to stay in Beijing? 英语翻译How many days did you learn english in 2002How many days How many days are there in July?回答此问题. that day,this day,these days,those days前用介词吗 that day, this day, these days, those days前用介词吗 翻译:how many days did you stay in beijing How many birthdays in May? how many hours（days..）可不可以等于how long?