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  3. For thousands of years comets had been a mystery to

For thousands of years comets had been a mystery to

游客2023-07-23  43
问题     For thousands of years comets had been a mystery to                              【M1】______
man. They travel across the sky very fast and have a
bright ’tail’ of burnt gas. The comet Tempel I has an                                【M2】______
orbit far outside the orbit of the furthest planet in our
solar system, Pluto. It has had been there for 4.6 billion years,                    【M3】______
133 million kilometres from Earth. Last week
a little American spacecraft crash into Tempel 1.                                    【M4】______
The spacecraft had a camera and it took a photograph
of the comet every minute after it finally crashed into                              【M5】______
its surface. The space mission to Tempel 1 cost $ 335
million and was called Deep Impact. Spacecraft was                                   【M6】______
travelling at 37,000 kilometres per hour when it hit the comet
and the crash completely destroying the spacecraft. But before                       【M7】______
it hit the comet, the spacecraft took some amazingly photographs.                    【M8】______
The last one was a close up picture the spacecraft spent                             【M9】______
just 3 seconds time before it crashed into the comet.                                【M10】______ [br] 【M5】
选项
答案 after改成before
解析 这是考逻辑，对文章意思的理解。按原句理解，飞船最终撞到彗星后每隔一分钟拍一张照片，好象飞船是有意要人家彗星的，这不符合常理。应该是在意外撞到彗星前按照正常的科研任务每隔一分钟拍一张照片。提醒：什么地方都会出错，不仅是语法错误，一定要当心啊。
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