Reading Passage 1: "William Kamkwamba"

each autumn a small number 
of North American birds are blown across the Atlantic by fast-moving westerly tail 
winds. Not only do they arrive safely in Europe, but, based on ringing evidence, 
some make it back to North America the following spring,
 after probably spending 
the winter with European migrants in sunny African climes.
Questions 21 – 22
Answer: 
A Birds often fly further than they need to.
Part of the passage [Par C]: 
that 
many birds journey much further than would be
necessary 
just to find food and good weather.
Answer: 
C Birds flying at night need less water.
Part of the passage [Par E]: 
Traveling at night provides other benefits. Daytime pred-
ators are avoided and
 
the danger of dehydration due to flying for long periods in warm, 
sunlit skies is reduced. 
Furthermore, at night the air is generally cool and less turbulent 
and so conducive to sustained, stable flight.
Comment: 
B is incorrect because Par C mentions how young birds can find their way 
while migrating without parental guidance (no family, but still safe);
D is very close, but still not 100% correct because even though Par E mentions birds 
see the world with a superior sensory perception to ours, it does not specifically say birds 
have sharper eye-sight than humans. Sensory perception is not only about vision, but 
30 - Day Reading Challenge
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also includes other senses such as taste, smell, touch and etc. 
E is incorrect because of the limiting word ‘only’.