1. You need not change the whole text as the beginning is all right. You can only rewrite the second part of it.
2. John may tell of the game: we know them.
3. It is already six o'clock. We must hurry if we don't want to be late .
4. They spent all the morning on the river bank. Only Ann to have to return home as she to be able to not stay in the sun for such a long time.