___are in the army.A.two their sons B.their two sons C.their sons twoD.two sons their

___are in the army.A.two their sons B.their two sons C.their sons twoD.two sons their 可以说an army army 有什么特别的用法可以说the army are in a high morale. James ( ) for three years.A.has joined the army.B.has been in army Lihua's brother has__for two years.a.joined the army b.been an army c.become a soldier d.been in the army 是join in army还是 join in a army? he ___for three years.A has joined the army B has been in the army 为什么选B He_____for twenty years.A.has joined B.has been in the army C.joined D.have saved the army He____for three years A)has joined the army B) has been in the army C) has been an army这题为什么选B不选C呢? He____for three years A)has joined the army B) has been in the army C) has been serving in the arm enter,join,take part in区别enter the army=join the army 为什么?enter a contest=take part in a contest 请问为什么？ my classmate （） the Army in 1998 A took part in B joined have you been in the army he was ageneral in the army --Dose Liu Hui serve in the army?--No,but he ( ) in the army for three years.A served B has served C is aerving D would serve ___are our friends.A.The animals B.Animals选什么 Li ming's brother is a .He works in the army(军队） he joined the army in 2009.改写同义句 he( )( ) a soldier ( )three years. He worked as a doctor in the army and saved many s___ lives按首字母填空