Giới thiệu:
Bài tập bổ sung tiếng Anh 9, gồm 10 units: UNIT 1: A VISIT FROM A PEN PAL UNIT 2: CLOTHING STOP AND CHECK (UNITS 1-2) UNIT 3: A TRIP TO THE COUNTRYSIDE UNIT 4: LEARNING A FOREIGN LANGUAGE UNIT 5: THE MEDIA STOP AND CHECK (UNITS 3-5) UNIT 6: THE ENVIRONMENT UNIT 7: SAVING ENERGY STOP AND CHECK (UNITS 6-7) UNIT 8; CELEBRATIONS UNIT 9: NATURAL DISASTERS UNIT 10: LIFE ON OTHER PLANETS STOP AND CHECK (UNITS 8-10)
