23. They (spend) the night in the flooded area before help (arrive)24. Simon (get) lost because he (not take) map with him.25. I (find) my pen after I (buy) a new one. 26. The door (not lock) ____________-unless you (press) ____ the green button.27. Jim won’t be late if he (take) _______________ the bus at 6 o’clock .28. Mary isn’t home, but if you (want) _____ to leave her a message, I (give) ________ it to her.29. If jack (clean) ________ the floor, I (do) __________ the washing.30. the children (be) _____ happy if you (give) _______ them some sweets