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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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Why does it seem like everyone in the office makes free _______________ the food in the fridge? It's clearly labeled!

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Because they don't have enough money to buy a bigger house, they must make up their _______ here

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He came ____________ me in the club and asked if I would like to dance

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..... her ....... in front of everyone wasn’t exactly fair

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 I’m not surprised Margaret's ill. With all the voluntary work she's __________,she’s really been doing too much

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She ______ yet. I _____ her for half an hour. Have the film started?

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English is compulsory _______ all students, but art and music are optional

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People of different countries have quite different life styles. We American are wasteful people, (25) _______ saving. Our grandfathers began this pattern, for nature’s resources seemed so plentiful that no one ever imagined a shortage. Within a few years of the first Virginia settlement, for example, pioneers burned down their houses when they were ready to move to west. They only wanted to have the nails for (26) _______ use. No one ever gave a thought to the priceless hardwoods that went up in smoke. We the people in the United States destroy many things that other peoples save. I (27) _______ this when I was living in Britain. I received a letter from one of England’s largest banks. It was enclosed in a used envelop that had been readdressed to me. Such a practice would be (28) _______ in the United States. American banks, (29) _______ the smallest, always use expensive stationery with the names of all twenty-eight vice-presidents listed on one side of the page

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I _____________ a feeling we’ve met before.

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It had been with a heavy ________ that I watched her leave, and I had sunk into a dark and despairing mood

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Don't worry, Joe's depression is only ____ - it'll soon pass

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____ will lead to the extinction of rare animals due to the loss of their habitats, and extreme floods and land erosion

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When we see someone in need, it's natural to want to help. Whether it is a friend next door or a stranger in another country, we want to do something to ease the pain of others.

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Tourism is changing rapidly as nature, heritage, and recreational destinations becomemore important, and as conventional tourism is forced to _____ tougher environmental requirements

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Two students are talking with each other about the weekend picnic: 
      Student 1: "Can you come with us?" - Student 2: “____”

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The students are ____ about recording audiobooks as Christmas presents for children with visual impairments

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Many students with visual impairments in regular schools cannot participate in school activities, thereby being left ____

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The invention of the mobile phone has undoubtedly revolutionized the way people communicate and influenced every aspect of our lives. The issue is whether this technological innovation has (25) _____ more harm than good. In order to answer the question, we must first turn to the types of consumers. Presumably, most parents (26) _____ are always worrying about their children’s safety buy mobile phones for them to track their whereabouts. We can also assume that most teenagers want mobile phones to avoid missing out on social contact. In this context, the advantages are clear. (27) _____, we cannot deny the fact that text messages have been used by bullies to intimidate fellow students. There is also (28) _____ evidence that texting has affected literacy skills. The widespread use of mobile phone has, out of question, affected adult consumers too. What employee, on the way home from work, would be reluctant to answer a call from their boss? Apparently, only 18% of us, according to a survey, are willing to switch off our mobile phones once we've left the office. Admittedly, mobile phones can be intrusive but there are obvious benefits to possessing one. Personally speaking, they are invaluable when it comes to making social or business arrangements at short (29) _____. They also provide their owners with a sense of security in emergency situations.

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He doesn’t need a ______ or a garden

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____ the temperature, ____ water turns into steam