A recent study may have an answer to one of (54)__________ mysteries in science – what is the purpose of sleep? The work (55)__________ it’s actually about making animals function more efficiently in their environments.

Pythons and bats are among the longest sleepers at over 18 hours a day. Human babies need 16 hours, and most of us probably feel we need around eight hours of sleep (56)__________ well.

Professor Jerry Seigel from the University of California, Los Angeles, conducted a study of the sleep times of animals and found that they vary widely. Some, like migrating birds, can survive long periods without sleeping at all. He believes that sleep helps to conserve (57)__________ and to make best use of limited resources. Sleeping also makes us less likely to (58)__________.

A recent study may have an answer to one of (54)__________ mysteries in science – what is the purpose of sleep? The work (55)__________ it’s actually about making animals function more efficiently in their environments.

Pythons and bats are among the longest sleepers at over 18 hours a day. Human babies need 16 hours, and most of us probably feel we need around eight hours of sleep (56)__________ well.

Professor Jerry Seigel from the University of California, Los Angeles, conducted a study of the sleep times of animals and found that they vary widely. Some, like migrating birds, can survive long periods without sleeping at all. He believes that sleep helps to conserve (57)__________ and to make best use of limited resources. Sleeping also makes us less likely to (58)__________.

David James’s drawing ability (49)__________ him the title of Art Director in arguably the (50)__________ most prestigious animation studio, DreamWorks Animation.

Make no mistake about it – this is big business. Each film takes approximately three years (51)__________ at a cost of between 60 and 100 million US dollars. You’ve probably seen some of them. DreamWorks has produced animated films such as Antz, Shrek and The Road to El Dorado.

“There is great appeal in working on animation,” says David, “You (52)__________ time to truly get into a project. Three years to develop the design from concept through execution. You are purely working in the world of (53)__________.”

David James’s drawing ability (49)__________ him the title of Art Director in arguably the (50)__________ most prestigious animation studio, DreamWorks Animation.

Make no mistake about it – this is big business. Each film takes approximately three years (51)__________ at a cost of between 60 and 100 million US dollars. You’ve probably seen some of them. DreamWorks has produced animated films such as Antz, Shrek and The Road to El Dorado.

“There is great appeal in working on animation,” says David, “You (52)__________ time to truly get into a project. Three years to develop the design from concept through execution. You are purely working in the world of (53)__________.”

David James’s drawing ability (49)__________ him the title of Art Director in arguably the (50)__________ most prestigious animation studio, DreamWorks Animation.

Make no mistake about it – this is big business. Each film takes approximately three years (51)__________ at a cost of between 60 and 100 million US dollars. You’ve probably seen some of them. DreamWorks has produced animated films such as Antz, Shrek and The Road to El Dorado.

“There is great appeal in working on animation,” says David, “You (52)__________ time to truly get into a project. Three years to develop the design from concept through execution. You are purely working in the world of (53)__________.”

David James’s drawing ability (49)__________ him the title of Art Director in arguably the (50)__________ most prestigious animation studio, DreamWorks Animation.

Make no mistake about it – this is big business. Each film takes approximately three years (51)__________ at a cost of between 60 and 100 million US dollars. You’ve probably seen some of them. DreamWorks has produced animated films such as Antz, Shrek and The Road to El Dorado.

“There is great appeal in working on animation,” says David, “You (52)__________ time to truly get into a project. Three years to develop the design from concept through execution. You are purely working in the world of (53)__________.”

David James’s drawing ability (49)__________ him the title of Art Director in arguably the (50)__________ most prestigious animation studio, DreamWorks Animation.

Make no mistake about it – this is big business. Each film takes approximately three years (51)__________ at a cost of between 60 and 100 million US dollars. You’ve probably seen some of them. DreamWorks has produced animated films such as Antz, Shrek and The Road to El Dorado.

“There is great appeal in working on animation,” says David, “You (52)__________ time to truly get into a project. Three years to develop the design from concept through execution. You are purely working in the world of (53)__________.”

In Tokyo, some of the busiest railway stations in the world have __________ computerised “smile scanners” to help employees __________ a better service. Now thanks to technology passengers can be assured of a friendly welcome from staff no __________ how hard-pressed they are.

The computerised “smile scanner” works by calculating the optimum curve of the lips. Those with a low score are given words of advice, such as, “you look too serious”.

Although the railway company says the smile scan system is not __________, all staff at the station have used it. The employees say the scan has helped them check their facial __________, which helped them communicate effectively with the customers.

In Tokyo, some of the busiest railway stations in the world have __________ computerised “smile scanners” to help employees __________ a better service. Now thanks to technology passengers can be assured of a friendly welcome from staff no __________ how hard-pressed they are.

The computerised “smile scanner” works by calculating the optimum curve of the lips. Those with a low score are given words of advice, such as, “you look too serious”.

Although the railway company says the smile scan system is not __________, all staff at the station have used it. The employees say the scan has helped them check their facial __________, which helped them communicate effectively with the customers.

In Tokyo, some of the busiest railway stations in the world have __________ computerised “smile scanners” to help employees __________ a better service. Now thanks to technology passengers can be assured of a friendly welcome from staff no __________ how hard-pressed they are.

The computerised “smile scanner” works by calculating the optimum curve of the lips. Those with a low score are given words of advice, such as, “you look too serious”.

Although the railway company says the smile scan system is not __________, all staff at the station have used it. The employees say the scan has helped them check their facial __________, which helped them communicate effectively with the customers.

In Tokyo, some of the busiest railway stations in the world have __________ computerised “smile scanners” to help employees __________ a better service. Now thanks to technology passengers can be assured of a friendly welcome from staff no __________ how hard-pressed they are.

The computerised “smile scanner” works by calculating the optimum curve of the lips. Those with a low score are given words of advice, such as, “you look too serious”.

Although the railway company says the smile scan system is not __________, all staff at the station have used it. The employees say the scan has helped them check their facial __________, which helped them communicate effectively with the customers.

In Tokyo, some of the busiest railway stations in the world have __________ computerised “smile scanners” to help employees __________ a better service. Now thanks to technology passengers can be assured of a friendly welcome from staff no __________ how hard-pressed they are.

The computerised “smile scanner” works by calculating the optimum curve of the lips. Those with a low score are given words of advice, such as, “you look too serious”.

Although the railway company says the smile scan system is not __________, all staff at the station have used it. The employees say the scan has helped them check their facial __________, which helped them communicate effectively with the customers.

Faster than any other biosystem, the world’s forests are __________. As much as a third of the total tree __________has been lost since agriculture began some 10,000 years ago. In the __________ forests there are more species than in any other biosystem, making forests the Earth’s chief resource for the biodiversity of species.

Tropical rain forests once covered 12% of the land of the planet. As well as supporting at least 50% of the world’s species of plants and animals, they are __________ to millions of people.

In North America, there is a replanting program, but the new forests are not as diverse as the _________ rain forests they are replacing. However, this does not mean that these forests are not important to the global ecology.

Faster than any other biosystem, the world’s forests are __________. As much as a third of the total tree __________has been lost since agriculture began some 10,000 years ago. In the __________ forests there are more species than in any other biosystem, making forests the Earth’s chief resource for the biodiversity of species.

Tropical rain forests once covered 12% of the land of the planet. As well as supporting at least 50% of the world’s species of plants and animals, they are __________ to millions of people.

In North America, there is a replanting program, but the new forests are not as diverse as the __________ rain forests they are replacing. However, this does not mean that these forests are not important to the global ecology.