17. They have been friends _________ many years. A. during B. since C. from D. for 18. She stayed at home ________ she was sick. A. in spite of B. because C. although D. because of 19. He spent a whole day ________ the radio. A. repairing B. to repair C. repaired D. repair 20. Giving a book report before the class is an interesting ________. A. act B. action C. activity D. active 21. It is impolite ________ people about their salary. A. asked B. asking C. ask D. to ask 22. They decided to go for a picnic ________ the cold weather. A. in spite B. when C. despite D. because of 23. People in my country are very open and _________. A. friend B. friendliness C. friends D. friendly 24. Alan agreed ________ hide and seek with me this afternoon. A. to play B. play C. played D. playing 25. They found some electrical ________ in the room. A. devices B. device C. advices D. advice cả nhà giúp mig cảm ơn

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