To keep safe _______an earthquake, you should remain at a spot in your room where nothing may fall on you.
Our English teacher _____ all the exercise books last Friday evening.
The bus came after I _____ for about half an hour.
I saw that he _____ at seven o’clock last night.
I didn’t go to see the film because I _____ it.
Did you ask the teacher what _____ this afternoon?