把if we keep on wasting so much paper,there will not be any t
把if we keep on wasting so much paper,there will not be any t
If we keep on__so much paper,there will not be any trees lef
There will not be any paper money ___100 years.
Books will only be on computers,not on paper.There only be o
there will not be any paper money in about 20 years
副词only的位置Books will only be on computers,not on paper.There
There won't be any elephants if we don't help them 转化为there
Books will only be on computers,not on paper.
Book will only be on computers,not on paper.
There won't be any paper money.改同义句
There won't be any elephants if we don't help them (同义词两种)
There won't be any elephants if we don't help them(改为同义句)