TRẮC NGHIỆM TRỢ ĐỘNG TỪ: WAS, DID, HAVE.

1. The flight ……. delayed because of bad weather.

2. ……. you do much sightseeing when you were on vacation in Madrid?

3. They ……. leaving for the airport when I last saw them.

4. I ……. forgotten to set my alarm clock, so I was late for my train.

5. ……. it raining when you left your office this afternoon?

6. The employees ……. informed last night that their company was going into receivership.

7. The police located the art work which ……. been stolen from the gallery.

8. The fire ……. caused by an electrical problem.

9. She was surprised that he knew her name. She ……. never met him before.

10. How many times ……. your travel documents checked before you boarded the airplane?