【Extra Practice 解答】

★Unit1 (Lesson A)

★Unit1 (Lesson B)

★Unit2 (Lesson A)

★Unit2 (Lesson B)

★Unit3 (Lesson A)

★Unit3 (Lesson B)

★Unit4 (Lesson A)

★Unit4 (Lesson B)

★Unit5 (Lesson A)

★Unit5 (Lesson B)

★Unit6 (Lesson A)

★Unit6 (Lesson B)

★Unit7 (Lesson A)

★Unit7 (Lesson B)

★Unit8 (Lesson A)

★Unit8 (Lesson B)

★Unit9 (Lesson A)

★Unit9 (Lesson B)

★Unit10 (Lesson A)

★Unit10 (Lesson B)

★Unit11 (Lesson A)

★Unit11 (Lesson B)

★Unit12 (Lesson A)

★Unit12 (Lesson B)