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Electric motors range in size from tiny mechanisms that operate sewing machine the great engines in heavy locomotives

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Either humans and animals learn by experience, and what is learned influences planning and carrying out of simple actions

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Sheep have been domesticated for over 5,000 years ago

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Some exercises such as calisthenics, running, or to swim involve producing muscle tension through range of movements that are called isotonics.

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Mr. Smith is going to buy a new Vietnamese car, doesn’t he?

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The knee is more likely to be damage most other joints because it is subject tremendous forces during vigorous activity.

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No one would have attended the lecture if you told the truth about gue speaker.

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Usually the climate mountainous area become much windy at higher altitudes

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Because a diamond is the hardest naturally occurring substance, it is used in industry for to cut, grinding, and boring other materials

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Short-wave radios that can receive and transmit signals are used by pilots, policemen, and amateur operator

Choose the correct answer to complete the sentence. "Don't make me feel guilty _______ I couldn't do anything about it."

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In the nineteenth century, women quilts to inscribe their responses to social, economic, and politics issues.

We’ve lost everything. Still, there’s no point in complaining. We’ll just have to try and make ___________

The boy speaks English __________making mistakes. 

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She never wears dinary cloths when she does gardening , aspecially during autumn 

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Somehow without the noticing,the wallet had been disappeared

Choose a, b, c, or d that best completes each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.

The house was very quiet when I…………home. Everybody had gone to bed.

Choose the best answer to complete each unfinished sentence, substitutes the underlined part.

The (A) heavy rain made it (B) possible (C) for us to (D) have our picnic.

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You have to study really hardly is you don’t want to fail your exams .

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In that age of computers, it difficult to imagine how tedious work of accountants and clerks must have been in the past.

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Hardly he had got downstairs when the phone stopped ringing yesterday afternoon.