ten years Miss Green returned to Canada.不成句 缺少ten years Miss Green returned to Canada.不成句 缺少什么部分?

It is ten years since Miss Green returned to Canada为什么不用It has been ten years since Miss Green returned to Canada ten years Miss Green returned to Canada.不成句 缺少ten years Miss Green returned to Canada.不成句 缺少什么部分? 英语翻译It is ten years ___ Miss Green returned to Canada.A.that B.when C.since D.as 请选择并进行翻译若选C,那么后面的句子不应该是这样的吗?Miss Green has been to Canada.It is ten years since Miss Green returned to Canada. Mr.Green has been dead for ten years.(同义句） Mr.Green ____ten years ____ Mr Green Lived in China for about ten years.对for about ten years提问 Miss Wu taught in this school ( ) .A.for ten years B.ten years ago C.ten years D.for ten years ago Miss Wang have taught English for ten years(同意句转换）It ( )ten years since Miss Wang ( )English GREEN YEARS 初二英语改同义句Mr Green came to China over ten years ago .=Over ten years ( )( )( )Mr Green came to China . 同义句改写 Mr Green came to China over ten years ago改成Over ten years ( ) ( ) ( )Mr Green came to China. Mr.Green has worken in the hospital for ten years.（对for ten years提问）（）（）（）Mr.Green（）in the hospital? Mr.Green has been dead for ten years为什么要用has been daed Mr Green came to China over ten years ago同义句1.Mr Green ____ _____ _____ China for over ten years .2.___ _____ Over ten years ____ Mr Green came to China.3.0ver ten years ___ _____ _____ Mr Green came to China. Mrs Green has lived in London for ten years判断对错 Miss Green ____ us English last year.She ___________ us for about two years.(teach) Mr Green worked in China for about ten years(对划线部分提问 划线部分是for about ten years ___ ___ _ my teacher,Mr Green,()(teach)English for more than 25 years,but he (teach)English for ten more yearsmy teacher,Mr Green,()(teach)English for more than 25 years,but he ()(teach)English for ten more years before he retires What does Miss Green