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................. the fifth largest among the nine planets that make up our solar system

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People usually can get a sufficient amount of the calcium their bodies ............. from the food they consume.

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Ha Long Bay cuisine is famous ____ its fresh and diverse seafoods

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Life Fitness has sent letters of appreciation out to customers ------- are expected to renew their memberships

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Eating organically grown food is a clear, intelligent, delicious choice _______, finding and affording only organic food is sometimes tough.

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Mary wore a _______ hat on the school trip last weekend

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Adolescents' friendships tend to last longer than do ____ of childhood.

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The next year they will ..... a low-priced car to compete with Ford

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__________meadows on the way.

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"Do I have to take that English course?"       - No, you ___________

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At the press conference, the Minister clearly stated that medical research would _______ precedence over space projects

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Please turn the water ____________ when you're done brushing your teeth

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He was…………..with an extraordinary musical ability

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I went to the airport ____ to meet her, but she didn't arrive

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A computer science degree can be used in ____ number of careers because of the variety of skills that graduates learn.

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___ much do you weigh?

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In this subject, we study maps and countries.

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Around 200 million people are employed in tourism worldwide, making it the largest industry in the modern global economy. It is estimated that three-quarters of a billion people go on holiday each year, and industry planners expect this figure to double (43) _____ 2020. Some of the biggest beneficiaries are less developed countries, where it is often their main source of income. (44) _____, along with the economic benefits, this mass movement of people has resulted in environment. People often forget the damage caused by carbon emissions from aircraft, (45) _____ contribute directly to global warming. Deforestation has cleared land in order to build hotels, airports and roads, and this has destroyed wildlife. In some areas, water shortages are now common because of the need to fill swimming pools and water golf courses for tourists. By pushing up prices for goods and services, tourism can also be harmful to people living in tourist destinations. In response to these (46) _____, some travel operators now offer environment-friendly holidays. Many of these aim to reduce the negative effects of tourism by (47) _____ only hotels that have invested equipment to recycle waste and use energy and water efficiently. Increasingly, tourists are also being reminded to show respect for customs of the people whose countries they are going to visit, and to support local businesses, such as restaurants and shops which depend on tourism for their main income

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Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes. The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea. Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey

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For a cleaner and greener community, everyone should ____ the amount of trash and take care of our environment

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Over the past 50 years, near-surface air temperatures across Alaska and the Arctic ____ at a rate more than twice as fast as the global average