Review 1

When (a)   melt, they produce water

The Himalayas are an example of (a)  

The (a)   of mount Everest is 8,848 meters above sea level.

Sometimes it's hard to breathe at high (a)  

We hiked from the (a)   to the top of the mountain

the mountain was (a)   and difficult to climb

The girl skied quickly down the (a)  

From the top of the (a)   we could se our house

to plant rices farmers carver (a)   into the mountains

To be (a)   , mountain-climbing ropes must be strong