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In the United States, the burning of fossil fuels to make electricity is the largest source of heat-trapping pollution, ____ about two billion tons of CO2 every year.

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The doctor insisted that she______to the hospital for tests

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There were many differences of opinion regarding how contagious measles was and how it was transmitted

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My flat was not _______ furnished, because I never had any money to furnish it any other way

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Is she just _____ to be crazy, or she really mad?

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Kiddy's mom is always complaining that she did not lift a finger to help ____ the housework

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The disabled artist digitally inserted himself ____ the picture

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The equator is an _____ line that divides the earth into two

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I might drop ....... for tea sometime this week

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We don't take the umbrella. We wish we ________

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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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Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) _____ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) _____ clear adverse effect associated with the prolonged use of mobile phones. Many studies are now going (41) _____ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation. (42) _____ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods of time. Don’t think that hands free phones are any safer either. At the moment, research is in fact showing the opposite and they may be just as hazardous. It is also thought that young people (43) _____ bodies are still growing may be at particular risk

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I enjoy ____ places I've never been to before

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They have been put in charge _______ distributing these pamphlets

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 It’s twelve o’clock, Nam. Let’s________ home.

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John has passed away last week. He died ________ lung cancer

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The hotel room was ……furnished with only a bed, a wardrobe and an ancient armchair.

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She ………………… homework in the evenings.

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Just like any institution, a family also needs rules. Rules are very important because they keep things in (26)_____. For a family, rules are as necessary as food and clothing. The rules are very important because they remain peace and order in the family. For example, children should respect and listen to their parents. If there are (27) _____ to be made, for examples, it is not only the parents who are going to decide especially if the children are already grown up. It would be better if everybody is involved in making the decision of important matter. Rules are needed to maintain a harmonious relationship (28) _____ family members. Parents are there the pillars of the family and guide children to be responsible and practice good values. Rules teach children to become more responsible and have discipline not only at home but especially outside of the home. When there are rules to follow, children will know (29) _____ they should do or should not do. Rules help to avoid conflict and misunderstanding that may lead to fights and aggression especially among children. Parents should set rules for the children to follow to avoid quarrels and fights. There are times when the children fight over simple matters and this happens if the parents do or not interfere but when parents set the rule and let the children follow, there will be (30) _____ conflicts

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Minh likes___________ a game of tennis on TV

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A lot of generous businessmen have ____ valuable contributions to helping needy people