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It's getting dark, so we'd better make __________ camp

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Polar bears are in danger of dying out. (25) _____ some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size by about 30 per cent. The temperature in the Arctic has slowly been rising and this is (26) _____ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (27) _____ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt. Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (28) _____ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (29) _____ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further

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It seems entirely natural to us that there are teams of scientists in universities and (46) _____ institutions around the world, attempting to discover the way the world works. (47) _____, it hasn’t always been that way. Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could (48) _____ the cause of natural events just by the power of thought. During the 17th century, more and more people began to realize that they could test their scientific ideas by designing a relevant experiment and seeing what happened. A lot of (49) _____ was made in this way by individual scientists. These men and women often worked alone, carrying out research into many different areas of science, and they often received very little (50) _____ for their hard work. At the start of the 20th century, though, it became clear that science was becoming more complicated and more expensive. The individual scientists disappeared, to be replaced by highly qualified teams of experts. Modern science was born

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I insist on ____ this small present as a token of my appreciation

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He often …………………… a train to work.

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She spread the blanket __________ the sleeping child

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______ will Mr. Dennis be able to regain control of the company

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He doesn't take hints very easily, but he'll ....... eventually

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Even though English is a hard language to master, you must keep trying!

How__________ students are there in your classroom?

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He wasn't aware that only one mistake could________his chances of getting the job

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While the Cambridge boat ____ under a bridge, it ____ another boat

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Scientific information can be translated to strengthen the capacity of parents and students to choose healthy foods and beverages as well as to encourage physical activity and discourage sedentary behaviors

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Turns ___________ I never lost the ticket—it was in my pocket the whole time!

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It’s a tough job, and we’re relying on you to carry it .......

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I have looked through the report, but I must admit, only ______

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 ______________ colours like blue and yellow can make people feel happy

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My sister is writing a letter to apply for the ____ of an English teacher at the center

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- Goodbye!

- Bye! ___________later!

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We got on well when we shared a flat, _____

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The students become more and more worried as the exam dates are approaching