7SHo, 7SHa, 7MB, 7GB - all of you need to complete the "finishing point" in unit 1, complete the "starting point" in unit 2 and session 1 unit 2 also.
7MO - Unit 2: Complete the "starting point" and session 1.
7CTh - Unit 1: Complete session 7 and start to look at session 8.
7KL - Unit 1: Session 8 and the "finishing point"
7SB - Unit 2: Complete the "starting point" and session 1.