Nhanh giúp em với ạ mn ơi

1. What a excellent clean-up work.

2. It was such a boring performance that we left before the end.

3. I haven't seen Barbara since the graduation ceremony.

4. The power failure prevented us from enjoying our family dinner.

5. They put a row of three trash bins next to the bus stop. 

6 The children aren't old enough to sit through a long concert.

7 It was really special to watch hundreds of people fall silent to listen to the pianist play.