Write: exercise 1, exercise 2, exercise 3, exercise 4
Choose: exercise 1, exercise 2
Fill in: exercise 1, exercise 2, exercise 3, exercise 4
Write: exercise 1, exercise 2, exercise 3
Fill in: exercise 1, exercise 2, exercise 3, exercise 4, exercise 5
Fill in: exercise 1, exercise 2
Write: exercise 1, exercise 2
Fill in: exercise 1, exercise 2, exercise 3
Write: exercise 1
Choose: exercise 1
Write: exercise 1, exercise 2, exercise 3, exercise 4, exercise 5
Write: test 1 (level 1), test 2 (level 2), test 3 (level 3)