(it is ） four years since we last saw each other.这句话括号里为什么不是there were

It is four years _____ I _____ here. Wen Qing has been making kits since four years ago(同义句）It is four years ________ Wen Qing _____ to make kites (it is ） four years since we last saw each other.这句话括号里为什么不是there were it is four years since I joined the army.这里的is,为什么不用was呢? Sue is four years old.Gina is four years old,too.(合并一个句子）Sue ( )( )( )( )( )Gina. 分析一下它的含义?It is has been four years since he lived here． It is nearly four thousand years _____A.youngB.oldC.longD.far It is four years since he bought the car.同义句 it is said that ___umbrella was invented over four thousand years ago by chi it is said that an umbrella was inventedover four thousand years ago by chinese people It is four years since I joined the army.啥意思 It is 1965.A little boy is at the beach with his ( ) .He is four years oldPlease看清题目捏 ... He is only four years old.是什么意思? 英语：对打( )提问...1.Our dog Lucky is （four years and two months）old.2.It’s about （two kilometres）from Tokyo to Beijing. four years Four Years 根据短文,完成句子How is it?The old man（老人） is already sixty years old.But he hasonly had fifteen birthdays.How is it?When is his birthday?Keys:His birthday is on FEbruary 29th.It is a leap tear(闰年）every four years.So he has had 初中英语同意句转换?He has been making kites since two tears ago.It is four years _______he_______to make kites.