In his twenties 这句话 twenties为什么是复数啊?

In his twenties 这句话 twenties为什么是复数啊? in his twenties 与in his early twenties 的区别 in his twenties in his twenties in his twelfth这两个词组成立吗 那第二个该怎样该 In her twenties 这句话中为什么用twenties 而不是twenty ? 在他20岁那年用英语怎么说?就是用这样的句型:when he was in his twenties.为什么twenties要用复数?有没有固定句型?那么这句话怎么翻译啊？when he was in his twenties谢谢 It was said that Tim was already very famous as a dancer _______ in the USA when he was only ten.A.in twenties B.of twenty C.in his twenties D.in the twenties我本来选的是C 但是后面的参考答案是D 不理解 还有 这句话的意思也 He worked in his twenties.in his twenties有什么道理? When he was ___ , Joe went to the United States .这是一道英语选择题,我不会所以向大家请教.选项 A on his twentis B in his twenties C in his twenties D in his twenty 英语翻译He is a young man in his early twenties. Police described him as a male in his early twenties. 翻译He is in his teens / twenties / thirties /… He became rich and f in his twenties.首字母填空 He became a teacher when he was __.A on his twenties B in his twentiesC in his twenty D at his twenties选哪个, in his twenties 和in his 20's有什么不同? He served in the army in ___when he was in ____A.1940's ;his twenties B.1940's ;the twenties C.the He served in the army in ___when he was in ____A.1940's ;his twenties B.1940's ;the twentiesC.the 1940's ;his twenties D.the 1940's ;the twenties He was only in ( ) at that timeHe was only in ( ) at that time A.his twenties B.his twenty-one C.the twenties D.the twenty-one in the late nineteen twenties 请问这句怎么解释? In his twenties,728 people___in the shopA.were employed B.employed C.are employed D.employ