Task 1. Complete the following sentences choosing right variant: 1.The efficiency of marshalling yards has been improved due to... a) the building of a great number of classification tracks, b) speeding up shunting operations, c) using automatic equipment. 2. The cars which roll from the hump by gravity are routed into… a) a sorting siding: b) a classification track: c) a main line. 3. The usual method of controlling the degree of retardation is…a) an electronic computer, b) a speed checking device: c)a special wheel device. 4. Repair shops situated close to modern marshalling yards are mechanized…a) to speed the repair of rails; b) to speed the repair of cars; c) to speed the repair of classification tracks5. The need for sorting cars at small, intermediate yards is eliminated because…a) there are many luge modern classification yards, b) railways made much progress, c) yards have a hump.

The great white shark is a species of shark. They are world's largest living predatory fish. The Great White Shark is gray or bluish above and white below. The largest Great Whites can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are between 13 and 16 feet and weigh 1,500-2,400 pounds. The Great White has massive teeth, which are positioned in rows and serrated. When the Great White attacks, it bites its prey and shakes it head back and forth. T
The Great White Shark normally feeds on fish, seals, dolphins, porpoises, otters, and turtles. 
Great White Sharks are most commonly observed throughout the world’s sub-arctic coastal waters, though they likely spend most of their time in the open ocean. Highest concentrations are found in the waters off the coast of South Africa, Australia, California, and Mexico. 
The great white shark usually has about two pups in a litter but can have as many as 10. These pups start out as eggs, and hatch inside their mother’s belly. While inside, they eat un-hatched eggs and sometimes they even eat each other! When they’re born, the pups are about five feet long, and they immediately swim away from their mother to find something to eat.
The great white is the most dangerous shark when it comes to attacks on humans. Even though there are a lot of people who are terrified of great white sharks (the word for “fear of sharks” is “galeophobia,”) you’re much more likely to die from a dog attack or a bee sting than a great white shark attack.