将下列句子改为同义句 1.Tom’s father joined the army in 1990 Tom’s father（）（）（）将下列句子改为同义句1.Tom’s father joined the army in 1990Tom’s father（）（）（）the army（）23 years2.They arrived in Beijing two hours agoThey（）（）（）Beijing（）two hours3.This stream became dirty last yearThis stream （）（）dirty（）last year4.They left Fuzhou five years agoThey （）（）（）（）Fuzhou（）five yearsIt （）（）five years（）（）they （）FuzhouIt （）five years（）they（）Fuzhou5.They went to the U.S.A.in 2000 and 2005

1、Tom’s father joined the army in 1990.
Tom’s father（has）（been）（in）the army（for）23 years.
2、They arrived in Beijing two hours ago.
They（have）（been）（in）Beijing（for）two hours.
3、This stream became dirty last year.
This stream （has）（been）dirty（since）last year.
4、They left Fuzhou five years ago.
They （have）（been）（away）（from）Fuzhou（for）five years.
It （has）（been）five years（ever）（since）they （left）Fuzhou.
It （is）five years（since）they（left）Fuzhou.
5、They went to the U.S.A.in 2000 and 2005.
They （have）（been）（to）the U.S.A.（twice）.