Part IV Cloze (10%)
Green sea turtles (海龟) are the world's largest species of hard-shelled sea turtle. While most individuals weigh about 136 to 181 kilograms, some can be 56 heavy as 204 kilograms. These turtles are found nesting (筑巢) along the coastline of more than 80 countries, with the largest nesting populations 57 in Costa Rica and Australia.
Green sea turtles spend most of their lives underwater, 58 they can rest for up to five hours at a time before 59 up for air. When active, they typically stay underwater for a few minutes and swim up to the surface to 60 air for a few seconds. Green sea turtles also bathe in the sun 61 land.
Unlike most other sea turtles, adult green sea turtles eat primarily plant-based foods 62 of seaweed and sea grass. Scientists believe these green foods 63 the sea turtle's fat its green color.
Similar to other sea turtles, green sea turtles travel long distances 64 their feeding grounds and their nesting sites, with recorded distances 65 than 2,600 kilometers. They have strong flippers (鳍形肢) that help them 66 in the water.
Female green sea turtles leave the water in 67 to lay eggs on the beach and will choose the same nesting 68 as where they were born. A female will dig 69 a nest with her flippers and lay about 115 eggs. Then she'll cover the eggs 70 sand and return to the sea. After about two months, the babies will use a special "egg tooth" to break their shells and hatch (孵化) from their eggs.
The first few years of a green sea turtle's life are spent 71 at sea, where they feed on tiny animals and plants 72 live in the surface layer of the sea. As they grow older, the turtles move to 73 waters along the coast, where they find sea grass to eat.
Adult green sea turtles face many threats, primarily from humans, including injuries from passing boats, being 74 in fishing nets and pollution. Newly hatched sea turtles are also at 75 of being hunted by other animals as they move from their nests out to the sea.
