1. join in (vp)
to become involved in an activity with other people
2. litter (v)
vứt rác (bừa bãi), xả rác
to throw pieces of paper and other small objects on the ground in public places
3. man-made (adj)
artificial rather than natural
4. mount (n)
núi, đồi, đỉnh
a mountain or hill, used as part of a name
5. amazing (adj)
kinh ngạc, tuyệt vời
Causing great surprise or wonder; astonishing.
6. backpack (n)
A bag with shoulder straps that allow it to be carried on one's back.
7. boat (n)
tàu thuyền, thuyền
something that people sit in to travel across water
8. desert (n)
an area of land without many plants or water
9. island (n)
land in the middle of water.
10. landscape (n)
a large area of land, especially in relation to its appearance