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I came __________ him in the library after work, and we got into a great conversation about Hemingway

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I was nowhere near here when the robbery ...........

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They’ve been going ________ for so long now that all their friends expect them to marry soon

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In this subject, we study maps and countries.

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Weak men wait _________ opportunity, but the strong men make it

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He's _________, so he can't hear your voice

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In animals generally, birth is considered to be the ____ of the life span

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They asked me when _________ 

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It is very .............. because the wind blows quite hard

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Energy-saving bulbs should be used ____ electricity

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Building necessary ____ such as hospitals, schools and parks is important

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Americans believe that the 50 states make ____________ a union that is greater than the sum of its parts

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The boy ____ across the narrow canal in ten minutes to find himself out of danger

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I'm a keen golfer and I ____ three golfing days that ____ £6,000, £8,000 and £5,000 last year

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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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It is politely requested by the hotel management that radios ____ after 11 o'clock at night

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Taylor and Adam __________ good friends.

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Someone's selling a car and you want to know how much he is __________

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Don't ___________me as if I were an idiot!

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Electricity and gas supplies have been seriously………by the floods.

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A main clause is sometimes called a ……..clause