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We can’t always _______ the traditions handed down to us from the past.

A. grasp B. replace

C. ruin D. observe

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下列句子中各有一处语言错误,请把错误改正,其他部分不得改动。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在右边横线上写出该加的词。

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修改:在错误的词下划一横线,并在右边横线上写出改正后的词。

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From self-driving cars to deep sea explorers, more and more of humans’ tasks are being taken over by robots. But technology doesn’t stop there. In mid-August, reported the BBC, scientists from Cambridge University developed a robotic system that meant a robot could “build other robots, each one better than the previous(以前的) generation”.

The BBC noted that “those concerned about machines taking over the world shouldn’t worry”.

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Unlike drones(无人机), which need a human hand, this kind of robot would have some decision-making abilities and the ability to act by itself. While what the BBC called these “solders that never sleep” could help reduce battlefield deaths, they might also make countries more likely to go into battle, which would lead to more deaths overall, noted the scientists. The risks, they said, could be far greater than those posed by nuclear weapons.

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A. Killer robots will visit UC Berkeley, US sooner than expected.

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A. explaining social networks of careers

B. describing people’s experiences

C. analyzing various research and data

D. comparing different gender behavior

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