1) Mountains: a large steep hill
Example sentences: 1) We can see the mountains from our classroom window.
2) We climbed the mountains with a lot of effort.
2) Passengers: a traveller on a public conveyance
Example sentences: 1) The passengers were tired after the long journey.
2 Passengers are not allowed to travel without ticket.
3) Rivers: a large natural stream of water
Example sentences: 1) The rivers crossed each other at a point.
2) The rivers crossed the mountains.
4) Precious: of great value
Example sentences: 1) It is a precious work of art.
2) Time is precious.
5) Mail: letters and parcels sent by post
Example sentences: 1) I got a mail from my grandfather.
2) He did not receive any mail from his college.
6) Plains: a large area of flat land with few trees
Example sentences: 1) Cows were grazing in the plains.
2) We went to a vast open plain on picnic.
7) Dusk: dim or dark
Example sentences: 1) He went home at the end of dusk.
2) The dusk fell quickly.
8) Dawn: first light of the day
Example sentences: 1) We had to get up at the time of dawn.
2) The dawn brought golden rays of sunlight with it.