MACMILLAN SKILLFUL 1 UNIT 6 THE EMPTY QUARTER

1 The tree and plant traces here................ that this area was once very green.

My professor has been to the Arctic more than a........ times.

Salar de Uyuni is a............salt flat located in Bolivia.

The pleasant weather....................allowed the plants to grow tall.

There has been a complete

.............of rain here for six weeks.

Polar bears hunt at the ................

of the ice- sometimes swimming,

sometimes running.

Death Valley and Joshua Tree Park ........

in a very dry area

of California.

My uncle has traveled to all the continents ..........

Antarctica.