Read the text below and then decide which word best fits each space. (Tip: read the whole text first trying to guess the words missing. Then read the text again, look at the options, and fill in the blanks with the correct word.)
Crocodiles
Crocodiles see well, their eyes are equipped with three eyelids, each having a different function. Their eyeballs slide back out of (1) ………….. way during an attack. Should they lose one of their eight-centimetre-long teeth, a replacement is always ready. A crocodile may go through (2) …………..thousand teeth during a lifetime of over seventy years. Crocodiles cannot chew, as their teeth are (3) ………….. only to penetrate and hold. These animals can attack any time of the year, but they are more active in the warmer months and when in (4) ………… of mates. Underwater, crocodiles (5) ………….. their victims at the water’s edge by sensing any movement in the water. Once they have a hold on their victim, they drag it deep into the water to (6) ………….. it. They then crush and swallow it.
Many battles occur over mates. About six weeks after mating, the female (7) ………….. a nest, often on a river bank, and (8) ………….. about fifty eggs. She then seals the nest for protection and also as a way of (9)………….. the temperature. After ten to twelve weeks the baby crocodiles come out of the eggs: only about one percent of these (10)………….. make it to adulthood, as thousands die in flooding or are eaten by fish or bigger crocodiles. In an attempt to ensure a source of (11) ………….. animals, crocodile farms have been (12)………….. up, and a vast industry now exists in crocodile skin and meat.
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