The Sahara desert is ________ as old as we thought.
A.
new
B.
seven
C.
twice
D.
sea
2.
[]
A ______ report from a climate research centre says it is _______ million years old.
A.
new
B.
sea
C.
years
D.
seven
3.
[]
Researchers worked out that a lot of North Africa became desert seven million years ago. A ______ started to dry, so there was less rain. This helped to make sand dunes, and started the Sahara.
A.
desert
B.
sea
C.
He
D.
old
4.
[]
The Sahara is a famous and big ________. It covers 10 per cent of Africa, from the Atlantic _______ to the Red Sea.
A.
years
B.
desert
C.
ocean
D.
sea
5.
[]
A researcher does not think the Sahara is so _____.
A.
he
B.
twice
C.
old
D.
we
6.
[]
He said the new report has no facts. _______ said nothing in the Sahara is older than 500,000 years old.
A.
we
B.
years
C.
ocean
D.
He
7.
[]
______ only know about the Sahara's climate from 10,000 ________ ago.
