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11. The electric light bulb was invented by Thomas Edison. 
12. Be sure to follow the instructions given at the top of the page. 
13. The family members taken by surprise hardly knew what to say. 
14. Students arriving late will not be permitted to enter the classroom. 
15. We drove along the road flooded after the heavy rain. 
16. The scientists researching the causes of cancer are making progress. 
17. The wild ox kept at Nam Cat Tien National Park is of a special kind. 
18. The helicopter flying towards the lake made a long droning sound. 
19. The winner of the marathon breathing deeply and smiling at the crowd raised her right hand and waved. 

20. The fish  we had for dinner was really delicious.
21. The country now has 300 power sattions, all of which are part of national network.
22. The people who work here are very helpful and courteous.
23. The handkerchief which was embroidered by my sister was really beautiful.
24. Any student not wanting to go on the trip should inform the office.
25. The forest is being destroyed at an alarming rate.