violin. 20. It worried her a bit that her hair was turning grey. 21. You can ’t imagine how they were excited when they received the nice present. 22. The problem is what we should do to help him. 23. Do you agree to the plan that we have a trip the day after tomorrow ? 24. When and how he goes home is his own decision. 25. Which team will win is uncertain. 26. Three days later, we heard the word that our country had sent up another man-mad e satellite. 27. Whoever fails to see this will make a big mistake. 28. It makes no difference whether our sports meet will be held this week or next week. 29. What we are doing now has never been done before. 30. Can you tell me whom the dictionary belongs to? Keys: 1—5 ABABC 6—10 AABAC 11—15 BBCAB 16—20 BCBAA 21—25 BABAD 26—30 31—35 BBDBC 36—40 DCDDA
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