He has four lessons in the morning every day．（改为一般疑问句）
he four lessons in the morning every day？
He sent me a few messages， but I （not reply） yet as I don't know what to say．
"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．