1. It was at least ten years that I went to Oxford.
2. Some old people aren't used to adjusting to digital technology.
3. On being asked about the strike, the minister declined to comment.
4. Someone might have been stolen your purse when we were in the restaurant.
5. It will take us at least 30 minutes to get to the airport.
6. No one could have failed to notice the change in the temperature.
7. I gave him my word that the situation would not be repeated in the future.
8. They decided that a new supermarket should be built more carefully before you decided.
giải thích:
* It was + time + (that) + S + V2/-ed..
* It + take/ took + O + time+ to V... (Mất thời gian làm việc gì)
* Câu bị động với Modalverbs: can/ should/must...+ be+ V3/-ed....