tho old man ,_____abroad for twenty years ,is on the way back to his motherlandA.to work B.working C.to have worked D.having worked 为什么选D?最好分析一下其他选项!

tho old man ,_____abroad for twenty years ,is on the way back to his motherlandA.to work B.working C.to have worked D.having worked 为什么选D?最好分析一下其他选项! the old man born! AN OLD MAN 翻译 old man是什么意思? The old man looks ( )is the old man? ( )is the old man? dirty old man是什么意思 old man是奥特曼吗? How old is that old man?答语 The old man __his glasses old man son of a Who is the old man? The old man[ ][ ][ ]his son The old man has poor____. The old man lives ____charity the old man said （s the old man is（ ninety years old?） 提问 （）（ ）is the old man