1. b goes
c start
d finishes
e does
f has
g studies
h study
2. b doesn't go
c don't start
d doesn't finish
e doesn't do
f doesn't have (has no)
g doesn't study
h don't study
3. b Do. No, they don't.
c Do. Yes, they do.
d Does. No, he doesn't.
e Do. Yes, they do.
f Do. No, we don't.
g Does. No, it doesn't.
h Do. Yes, we do. (если у вас больше предметов, чем у Марка) No, we don't. (если у вас меньше предметов, чем у Марка)