The homing instinct is what makes certain animals, birds and fish return... the place they consider home.
to
15
Cats often have this instinct. It was particularly strong in an American cat called Ninja, which disappeared shortly... its owners had taken it to their new home.
after
15
A year later, the cat turned up at its old home even... this was 1360 km away from... its owners were now living.
though / where
25
Other cats may not travel so fat but many... on going to back to their old home.
keep
15
Pilsbury, an English cat, make a 13-kilometre journey back to its former home 40 times in spite of having to cross several busy roads to... so.
do
15
Pigeons also have the homing instinct and ever... ancient times, human beings have used them to carry messages back home.
since
15
However, cat owners, ... have to keep returning to their old addresses in... to bring their cat home, tend to find the homing instinct simply irritating.
who / order
15
The history of surfing undoubtedly goes... a long way.
back
15
It seems to... formed a central part of the culture of the Polynesian people, who where inhabitants of islands in the Pacific... as Samoa.
have / such
25
For them, it was much... of an art.
more
15
Although surfing disappeared from many parts of Polynesia in... early 20th century, a small number of people in Hawaii kept the tradition alive.
the
15
In 1912, it spread to the east coast of the USA, and in particular to Virginia Beach,... became an important surfing centre.
which
15
However, ... was not until the 1960s that surfing came to be a truly global phenomenon, boosted not only by the success of surfing films ... also by pop songs about surfing culture.
it / but
25
The most distinctive feature of a camel is the hump on... back.
its
15
In these humps, camels store fat... is used as enerdy when they don't have access to food.
which
15
They can put... with very diffcult conditions, drinking only a little or... water for up to seven days.
