complete the sentences with the words in the box.

beach , desert , forest , hill , sea , mountain

1)they're swimming in the ... 2)It's hot and dry. We're un the ... 3)Let's sit on the...and look at the sea.4)It's easy to walk up this...it's not very high.5)There are a lot of tall trees.We're in a... 6)It's hard to climb up this because it's very high.It's a ...