The most extreme weather conditions experienced in Antarctica are associated _____ blizzards.
with
10
These are simply strong winds with falling snow _____, more commonly, snow that is picked up and pushed along the ground by the wind.
or/and
15
Blizzards may last for days at _____ time, and in some cases it can be almost impossible for people to see.
a
20
It is not unusual _____ objects only about a metre away to become unrecognisable.
for
20
Objects only about a metre or _____ away become unrecognisable.
so/less/two
20
Scientists doing research in the area _____ then confined to their tents or caravans.
are
5
We think of blizzards _____ extremely cold.
as
5
In fact temperatures in the Antarctic are usually higher than normal _____ a blizzard.
in / during / throughout
25
It is not unusual _____ objects only about a metre away to become unrecognisable.
for
15
_____may be eight or ten blizzards in any particular place.
There
10
_____ an annual basis blizzards are numerous.
On
25
They often cause considerable damage, so that any scientific buildings or equipment constructed in this region must be specially made to give as _____ protection as possible.
much
10
_____ this means is that people often greatly underestimate the distance of objects and features of the landscape.
What
25
Also, very large features _____ as mountains may appear to be above the horizon, or even upside _____.
such
20
‘Mirages’, _____ are just tricks played by the eyes in certain conditions
which
10
These have led to explorers in the Antarctic making many errors _____ judgement.