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Exercise 1: add "-ing" Exercise 2: "was" or "were" Exercise 3: aff. (writing) Exercise 4: affir. (writing ) Exercise 5: neg. (writing) Exercise 6: negat. (writing) Exercise 7: questions (writing) Exercise 8: questions (complete) Exercise 9: questions (writing) Exercise 10: test (recommended) Exercise 11: mixed (complete) Exercise 12:mixed (complete)
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