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For thousands of years comets had been a mystery to 【M1】______ man. They travel across the sky very
For thousands of years comets had been a mystery to 【M1】______ man. They travel across the sky very
admin
2010-09-10
41
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】______
【M4】
选项
答案
crash改成crashed
解析
考动词时态,一般过去时。此句中有明显的时间标志last week,所以主动词应该用一般过去时。
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0
大学英语四级
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