=>
1. Our flight was delayed, which means we had to wait for hours at the airport.
2. Would you mind lending me your car? (would mind+ Ving)
3. They used to go to Vung Tau at the weekend. (used to+V)
4. Where was Nam born in 1993?
5. Unless we hurry up, we will miss the train. (Unless= If...not)
6. I didn't buy the motorbike because of its expense. (expense (n)-expensive(adj) )
7. Barbara used to stay with an Italian family when she was in Italy. (used to + V)