I don’t like talking on __ telephone; I prefer writing __ letter.
— I dreamed of some animals running on the moon. — It ____ be. There is no air or water on the moon, you know.
An American plane is reported ____ in the Atlantic Ocean with 228 people aboard, the airline’s worst disaster in its 75-year history.
Time should be made good use of ____ our lessons well.
— ____ you read the newspaper? — Yes. I ____ it on the bus while I was on my way to work.
We ____ on this project for four hours. Let’s have a rest.