According to scientists, our mental abilities begin to _____ from the age of 27 after reaching the highest level at 22.

A．differB．shrinkC．failD．decline

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Six men have been trapped in a mine for seventeen hours. If they are not brought to the surface soon they may lose their 1. (life). However, rescue operations are 2. (prove) difficult. If explosives are used, vibrations will cause the roof of the mine 3. (collapse). Rescue workers are therefore drilling a hole on the north side of the mine. They intend to bring the men up in 4. special capsule. 5. there had not been a hard layer of rock beneath the soil, they would have completed the job in a few hours. As it is, they have been drilling for sixteen hours and they still have a long way to go. Meanwhile, a microphone, which 6. (low) into the mine two hours ago, has enabled the men to keep in touch with the closest relatives. Though they are running out of food 7. drink, the men are 8. (cheer) and confident that they will get out soon. They have been told that rescue operations are progressing 9. (smooth). If they knew how difficult it was to drill 10. the hard rock, they would lose heart.

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短文改錯(cuò)

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刪除：把多余的詞用斜線（\）劃掉。

修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫(xiě)出修改后的詞。

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Imagine falling towards the planet Earth at 1. awesome speed of 300 kilometers per hour. You start your fall from over four kilometers above the Earth. And you have less than one minute before you pull your parachute (降落傘）cord. You are falling 2. fast that just turning your head can send you off 3. a different direction. This is the wild side of a sport that has not found its limit—freeflying.

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