外语考试试题及答案解析
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案例分析题Harpoons，nets and sails are to be sent into space in an effort to tackle the problem of space junk，scientists have revealed.The mission，called RemoveDebris，is expected to （1）early next year and will test a range of devices （2）to sweep up litter （3）around the Earth.The scientists say that，（4）such technology，satellite-based communication，weather monitoring and navigation systems could be at risk. Around 7，000tonnes of space junk are estimated to （5）our planet，ranging from defunct satellites to tiny fragments of debris，（6）the figure rising （7）.It’s a very real （8）due to the fact that， （9）objects larger than 10cm can be （10），even tiny fragments of debris can cause damage. But an international team of researchers say they have designed a （11）of systems to solve the problem.（12）at the Royal Society’s summer science exhibition this week，the systems included a net，harpoon and drag sail，which scientists have （13）into a test platform for launch into space.At the end of the mission the third system，a drag sail will be （14）.Similar systems have been （15）for future satellites to allow them to be disposed of without （16）space junk.（17）by the European commission to the sum of around €13m （£10.9m），the RemoveDebris mission is set to be one of the world’s first mission to test systems for （18）junk in space.While a full-scale mission is likely to cost significantly more，Forshaw believes it is a （19）expense."The reality is you are spending a small amount now to prevent huge disasters from （20）in the future." he said.
19应填（）
A.necessary
B.massive
C.surprising
D.wasted
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