I spent an hour at the station waiting for the train. （改为同义句）
It me an hour wait for the train at the station.
"When the book （publish） in November， I'm going to donate all the money to help those people in need，" said J．K． Rowling．
Have you found any useful clues， sir？
We （work） on it． There's nothing much I can say at the moment．
Millions of young people （fight） in World War Ⅱ so we could live in peace．
Schools are still closed in some countries （stop） the spread of the virus．
Don't worry． Hobo is a smart dog and I'm sure he （come） back soon．