Misled people tend to think that using an animal

The writer thinks that a new job is______to people． A．a duty B．a challengeC．an

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Although many people tend to live under the illusion that traditional technology and

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People in eating disorders tend to ______.A．strive to be thin by starvationB．take an unhea

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CAN ANIMALS BE MADE TO WORK FOR US？ Can animals be made to work for us？ Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings. The

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Helping strangers used to be considered as a virtue. But nowadays people tend to be very c

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Populations tend to grow at an exponential （指数的) rate. This means that they progressive

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While the general public tend to agree that animals should be treated humanely, most peopl

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