Look, there are so many _______ in the sky. It’s going to rain.
Jack, please tell Tom to call me when he ______ back.
Mr. Black asks the kids ________ in the river, because it’s too dangerous.
You have to leave now_______ you can catch the early bus.
---Were you at home at 7:00 yesterday evening? I called you but no one was there. ---Sorry, we ___________ a movie at the theatre at that time.
Helen got up too late this morning, so she went to school _____ breakfast.