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Why does the process of diffusion not require any energy?
A. Solutions must reach equilibrium so the cells start to move rapidly.
B. The particles move randomly,
C. The nucleus controls the diffusion.

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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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