Đáp án:
6. A big celebration is being planned to mark the start.
- "S + be + being + Ved/V3",
7. The police think he might be had murdered.
8. They didn't know the bones were human until a number of tests was had been carried.
9. In the next decade,more electric cars are going to be made by car manufacturers.
10. If the car is fitted with an alarm, it can't stolen.
