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A．How to operate the computer.B．How to have a break after work.C．How to choose the rig

A. How to operate the computer.
B. How to have a break after work.
C. How to choose the right glasses.
D. How to avoid eye problems before computer.

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This suggests that these "top dogs" of the ocean are【C6】and multiplying.【C7】, such has not been the case, at ieast not for the last 150 years. Trouble has closed in【C8】these mammals in the form. of equally warm-blooded and even more【C9】adaptable predators, humans. At sea,【C10】on land, humans have now【C11】themselves on the top of the whole great pyramid of life, and【C12】have caused serious problems for the mammals of the sea, There is a simple【C13】for this.
【C14】mammals have the misfortune to be swimming aggregates of【C15】that humans want: fur, oil and meat. Even so, they might not be so【C16】to human depredation if they did not, like humans,【C17】so slowly.
Every year humans【C18】more than 50 million tons of fish from the oceans without critically depleting the population of any【C19】. But the slowbreeding mammals of the sea have been all but wiped out by humans【C20】__satisfy their wants and whims.
【C1】

A. involved
B. evolved
C. evoked
D. exceeded

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A．To live a more comfortable life.B．To give performances.C．To be a pupil of a famous v

A. To live a more comfortable life.
B. To give performances.
C. To be a pupil of a famous violinist.
D. To enter a famous university.

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Which of the following is TURE of the level of happiness？

A. Country with small income differences has a high happiness level.
B. A harmonious country condition equals to a high happiness level.
C. Levels of happiness have a close connection with economic development.
D. The improvement of life quality may prove a high happiness level.

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What's the author's opinion about America？

A. It's a salad bowl.
B. It's a melting pot.
C. It has more unity than diversity.
D. It's a mixture of unity and diversity.

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A．How to operate the computer.B．How to have a break after work.C．How to choose the rig