26. A
- There are some fish below me and above me
27. B
- litter = how rubbish; Oh, no, they're littering!
28. C
- A plastic bag is around my leg. It's hard to swim [...]
29. D
- living things: vật sống; Please don't litter! It's bad for all living things
30. C
- I'm swimming in the lake
`B`. Writing
31. No one in our class is more intelligent than Nam (so sánh hơn tính từ dài: S1 + tobe + more adj + than + S2)
32. My brother would like to be an architect when he grows up (would like + to V(inf) = want + to V(inf): muốn)
33. It is very interesting to have a summer camp abroad (It + tobe + adj + to V(inf)
34. My father will go to Ho Chi Minh City by plane next Sunday (fly = go by plane)