Làm và giả thích vì sai giúp mj nha 11. The Prime Minister will give (a/an/ the/Ø)speech this afternoon. 12. There is (a/an/ the/Ø) custom of doing morning exercises in my family. 13. I haven't been to (a/an/ the/Ø) open-air theatre before. 14. Here is (a/an/ the/Ø) thousand pounds I borrowed from you last month. 15. "Li xi" is (a/an/ the/Ø) essential part of Vietnam's customs of the Tet Festival. 16. Storytelling is (a/an/ the/Ø) way to keep the local tradition alive. thel) onflict between the old and the young.