对他来说在5分钟内画完一幅画是不可能的.It's impossible for him___ ___ ___a pict

对他来说在5分钟内画完一幅画是不可能的.It's impossible for him___ ___ ___a picture in five minutes.
用英文翻译.
还有The flower exhibition has been open for 7days.(改为同义句）
The flower exhibition has been open ______ ______ ________ _________.
His grandpa died 3 years ago.(改为同义句）
His grandpa _______ ________ _________ _________ 3 years ago.
____________ 3 years his grandpa died.