2. Emma’s mother air ticket wasn’t ordered.
3. Have the Christmas cards been sent to her family?
4. They haven’t been seen since last month.
5. Several zoos have been built to protect animals and entertain people.
6. How far is it from the Earth to the moon on the average?
7. What can we send her on her birthday?
8. Why do people install security camaras?
9. When did you go to Nam’s birthday?
10. How much sugar did she use to make a Squid Game cookie?
11. If it didn’t rain all day, Hoang would join in the game.
12. If Jack hadn’t answered well in the interview, the company wouldn’t have renewed the contract.
13. If my mother hadn’t been so busy, she couldn’t have gone to the concert.
14. If his sister spoke English, she would get the job.
