1. Some fashion designers have printed lines of poetry on the “ao dai”, so it looks modern. Because .................................................................................... 2. Poets have mentioned the “ ao dai” in poems for centuries. The “ao dai”............................................................................... 3. The design and material used for men were different from those used for women. The design and material used for men were not ....................................................... 4. My father stopped smoking two years ago. My father hasn’t ............................................. 5. Let’s use electricity economically. Why ................................................................? 6. Some one will blow a whistle if there is an emergency. A whistle ......................................................................... 7. They have worked in that factory for ten years. They began .......................................................... 8. Theboy is sorry for being late. The boy wishes ................................. 9. Lan hasn’t written to Mary for a month. Lan didn’t .................................................... 10. Both men and women frequently wore the “ ao dai” The “ ao dai” .............................................................. 11. Some beautiful patterns have been added to the “ ao dai” by fashion designers. Fashion designers ........................................................................................................ 12. You should pay your bill before you leave the hotel. Your bill ....................................................................... mik chỉ xin các bn lm cho mik bài này thôi ạ trc 9h mik cần gấp