40. Some people think that as more and more people have TV in their homes so fewer and fewer
A B C
people will buy books to read.
D
V/ Read the following passage and choose the most suitable option among A, B, C
and D to fill each numbered blank
From recent (41) … we now know that crocodiles (42) … an extremely unusual form of
haemoglobin – the substance which carries oxygen in the blood. As a result, this has a direct (43) … on
the length of time they can hold their breath and consequently their ability to stay underwater for a long
time. This is very important (44) … they drown their victims by holding them underwater. When
crocodiles hold their breath, their bodies produce a chemical signal which makes their haemoglobin
give off more of its oxygen than usual. Crocodiles can then (45) … that oxygen without any need to
breathe in more air.
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