（will）（back)(shanghai)(to)(go)(i)(friday)(on)这些英文单词拼成一段话.都要用上，为什么要这样，back在这的意思

she isn't sure when she will leave for Shanghai 同义句 she isn't sure_____ ______ ______for shangha I will never back I WILL COME BACK “I will be back! I will back words WE WILL BE BACK We will be back! 英语题(按要求改写句子）1.I'll stay at the hotel for two weeks.(对“for two weeks”提问）2.Let's go out for a walk.(改为附加疑问句）3.I believe it.You won't leave the city next week.(合并为一句）4.They will go to Shangha 1、 Mike is twelve years old.Billy is ten years old.(合并为一句）Mike is ____ ____ ____ ____ Billy.2、be ,Sunday ,will ,Tree Planting Day ,next (连词成句）3、town,in,live,the,of,they,centre (连词成句）4、nice,is,place,live,Shangha He will come back right away.(改为同义句）要6句!①He will come back ______ ______ ______.②He will come back ______ ______ ______.③He will come back ______ ______.④He will come back ______ ______.⑤He will come back ______.⑥He will c it will not be long_____they come back(填介词） Tomorrow i will go back home.（改为否定句） They （not come）back yet.I think they will comThey （not come）back yet.I think they will come back in an hour. I will be back,We will be back we will be back还是WE WILL BACK哪个对 i will be back soon When will she come back? When will she come back