英语翻译 how old is Jack's brother now when Jack is fifteen in the story?

How old is Jack Smith 英语翻译 how old is Jack's brother now when Jack is fifteen in the story? How old is Jack?I think_____(he is)12.填空 英语翻译Jack is twice as old as Bill,who is eight years younger than Ben,who is four years younger than Ted,who is half as old again as Jack.How old is Bill? 英语翻译Jack is twice as old as Bill ,who is eight years younger than Ben,who is four years younger than Ted,who is half as old again as Jack,How old is Bill? 英语翻译Jack is twice as old as Bill,who is eight years younger than Ben,who is four years younger than Ted,who is half as old again as Jack.How old is Bill?我翻译的不太明白, 英语翻译Jack is twice as old as Jill,but in five years time he will only be one and a half times as old as Jill.How old are Jack and Jill now? 英语翻译How old is your cousin?不算 MARY IS 12 YEARS OLD .TWO YEARS AGO ,SHE WAS TWICE AS OLD AS HER BROTHER JACK.HOW OLD IS JACK IS? 急mary is 12 years old .two years ago ,she was twice as old as her brother jack.how old is jack now? Mary is 12 years old.Two years ago, shewas twice as old as her brothei jack,How old is jack now? jack is a four-old( ). Who can stop many trucks with one hand?Many is 12 years old.Two years ago,she was twice as her brother Jack.How old is Jack now? 剑桥少儿英语第二级A第9课习题Jack is twice as old as Bill,who is eight years younger than Ben,who is four years younger than Ted,who is half as old as Jack.How old is Bill? Jack is 15 years old,three times as old as his sister.How old will Jack and his sister be when he is twice as old as his sister? jack is twice as old as Bill,who is 8 years younger lhan Ben ,who is 4years younger than Ted,who ishalf as old again as jack.How old is Bill?谁能算出来 请速回. how old is How old is