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What is the most basic unit of structure and function?
A. a tissue
B. a cell
C. an organ
D. an organ system

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I need help here. I need long answers

past participle   8. Two years ago Timmy (win, won) the pole vault.
past participle   9. The local newspaper has (wrote, written) about him often.
____________ 10. A photo they (take, took) of him won a sports award.
    base form    11. Have you (go, gone) to any of the events yet?
    past form     12. I (gone, went) to watch the broad jump yesterday.
____________ 13. Sam (tell, told) us that his right knee is sore.
____________ 14. He hopes he has not (tore, torn) a muscle.
past participle  15. He has (see, seen) a doctor about it already.
____________ 16. I (think, thinking) the doctor recommended heat.
____________ 17. Did you know that he has (have, had) an operation on that knee?
____________ 18. We hope the twins (win, winning) a track scholarship to college.
____________ 19. After the track meet, may I (ride, rode) home with you?
____________ 20. I (drive, drove) here yesterday with my sister.
11. I ______ in school almost all day. (past tense of be)
12. My sister ______ money for college. (future tense of save) 
13. After weeks of looking, Jim ______ a job. (past tense of find)
14. She ______  the office about the meeting. (future tense of notify)
15. ______ you please ______ the door for me? (future tense of open)
16. The twins ______ almost always together. (present tense of be)
17. They ______ for three days to get here. (past tense of drive)
18. I ______ my new radio with me to the beach. (past tense of bring)
19. Consuelo ______ for the job tomorrow. (future tense of interview)
20. It ______ almost time to leave for class. (present tense of be)
21. I ______ never ______ his face. (future tense of forget)
22. Jacob ______ his jacket on a nail. (past tense of hang)
23. I think I ______ my car keys in the grass. (past tense of lose)
24. The French club ______ a debate tomorrow. (future tense of hold)
25. Our side ______ the mock trial. (past tense of win)
26. Who ______ the Declaration of Independence first? (past tense of sign)
27. I think he ______ about the surprise party. (past tense of know)
28. Alfonso ______ us paint the room. (future tense of help)
29. Shakespeare ______ many fine plays. (past tense of write)
30. Last week Beth ______ ten laps. (past tense of swim)
31. The gym ______ soon ______ new equipment. (future tense of need)
32. Arturo almost ______ all the potato salad. (past tense of eat)
33. I m ______ y paycheck to the bank. (future tense of take)
34. His old car ______ down on the highway. (past tense of break)
35. The crowd of people ______ past us. (past tense of run)
36. Mom ______ about the boys. (present tense of worry)
37. My quarter ______ in the parking meter. (past tense of jam)
38. The conductor ______ us the right stop. (future tense of tell)
39. Grandma ______ me how to knit. (past tense of teach)
40. The batter ______ a swing at the ball. (past tense of take)

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