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The amount of oxygen and nitrogen in the air almost always remain stable, but the amount of water vapor vary considerably.

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George won’t lend you money_____ you promise to pay him back.

Choose the letter A, B, C or D to complete the sentences

The leader said that ___________ to award the prize to me.

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Each of the beautiful cars in the shop were quickly sold to its owner

Choose the word or phrase that best completes each unfinished sentence below or substitutes for the underlined word or phrase. 

She works very______ .

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This house is often broken off and a lot of things are taken away.

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______ is the study of the earth and its countries, mountains, rivers, weather, etc.

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If they_____ soon, I’m not going to wait.

Kenji and Ykari are new students in Peter’s class. They are from Japan. They said they (21) ____ together, (22) ____ a week. They studied their textbook (23) ______ it has the grammar at the back. They learned the rules (24) _____ heart and then they wrote lots of sentences and examples, and practiced with conversations. 

(24)....... 

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Weather and geography conditions may determine the type of transportation used in a region.

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The woman tells them close their eyes tightly and cover them with their hands.

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Why did all the customers at the Red Lion have to pay of their beer that week?

 I went to bed _____ last night.

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Without plants, water would run off and take away________ soil.

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Junko Tabei, is a Japanese from Hokkaido, was the first woman to make this difficult climb.

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Professor Jones said that a good way to improve your language are learning to practise it frequently.

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A largely percentage of Canadian export business is with the United States.

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During the Revolutionary War, American patriot wives and children frequently had to take refuge in forts escaping attacks

Choose the word or phrase that best completes each unfinished sentence below or substitutes for the underlined word or phrase.

Try ______ here on time.

She made some interesting______about the film.

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The earth is the only planet with a large number of oxygen in its