18- The author states that Aspirin……… .
A) has been available in tablet form since 1899
B)became popular worldwide In 1899
C) was first sold by Bayer in 1915
D)was Initially only available after seeing a doctor
E) was commonly used in Germany prior to 1915
The Sahara desert in north Africa stretches eastwards from the Atlantic to the Red Sea and
southwards from the Mediterranean to the grasslands and tropical forests of equatorial Africa. It has
an area of about 8 million square kilometres and is the world's largest desert region. The world’s
highest temperatures have been recorded in the Western Sahara. The traditional inhabitants have been
the nomadic Berbers and Arabs moving from oasis to oasis: but vast areas remain totally uninhabited.
There is the evidence of recent severe draughts in parts of Nigeria and neighbouring countries to
suggest that the Sahara is expanding southwards. On the other hand, there are plans to irrigate some
areas; also, the desert has valuable deposits of oil, iron ore phosphates and uranium.
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