III
1,B(unless=if not)
2,A(loves + V_ing)
3,A(lời khuyên)
4,A(live in the moutain ⇒ have fresh air ⇒=so)
5,D(bottle là countable)
6,A(tương lai đơn)
7,B(junk food:unhealthy)
IV
1,did you visit hoặc where did you visit(vì nếu là did you visit thì phải có nơi visit (vd:hanoi,hcm...))
2,i have just bought a ticket.____(có just)